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Erschienen in: World Journal of Surgical Oncology 1/2019

Open Access 01.12.2019 | Research

Patient satisfaction after unilateral oncoplastic volume displacement surgery for breast cancer, evaluated with the BREAST-Q™

verfasst von: Anna Gardfjell, Cecilia Dahlbäck, Kristina Åhsberg

Erschienen in: World Journal of Surgical Oncology | Ausgabe 1/2019

Abstract

Background

Oncoplastic breast-conserving surgery allows larger resections in unfavorable locations, with an improved chance of preserving esthetics. Indications and timing for potential contralateral surgery to obtain symmetry are not clear. The aim of this study was to evaluate patient satisfaction after unilateral oncoplastic volume displacement surgery, to investigate potential risk factors for lower patient satisfaction and to assess patient wish for contralateral surgery.

Method

A cohort of 144 women, consecutively treated for breast cancer with unilateral breast-conserving oncoplastic volume displacement surgery, followed by radiotherapy and with an unoperated contralateral breast, was sent the BREAST-Q™ breast-conserving therapy (BCT) and a study-specific questionnaire. In all, 120 women (83%) responded. For these women, the median value for resected specimen weight was 92 g (range 14–345) and for the estimated percentage of the breast volume excised 15% (range 3–35%).

Results

The median patient-reported score for “Satisfaction with breast” (BREAST-Q™ BCT) was 74/100. Factors associated with a score below median value in a simple logistic regression model adjusted for age and BMI were axillary clearance (OR 2.46, 95% CI 1.09–5.56), neoadjuvant chemotherapy (OR 3.26, 95% CI 1.15–9.24), and low breast density (OR 2.32 95% CI 1.02–5.29). Thirteen women (11%) were interested in contralateral surgery.

Conclusion

Most patients in this study cohort, who had undergone breast-conserving therapy with oncoplastic volume displacement techniques, were satisfied with their breasts without surgery to the contralateral breast. This indicates that contralateral surgery to achieve symmetry only should be performed after individual evaluation and as a delayed procedure.
Hinweise

Publisher’s Note

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Abkürzungen
BCS
Breast-conserving surgery
BCT
Breast-conserving therapy
BMI
Body mass index
CI
Confidence interval
EPBVE
Estimated percentage of breast volume excised
HR-QoL
Health-related quality of life
IQR
Interquartile range
NAC
Nipple-areolar complex
NCSP
NOMESCO classification of surgical procedures
OPS
Oncoplastic breast-conserving surgery
OR
Odds ratio
PROM
Patient-reported outcome measure
PRT
Postoperative radiotherapy
WLE
Wide local excision

Background

Breast-conserving therapy (BCT) is the preferred treatment for early-stage breast cancer [1], with equivalent survival [2, 3], and esthetic, functional, and psychosocial advantages compared to mastectomy [4, 5]. Ideally, the breast should appear normal-looking after BCT. However, studies have shown that up to 30% of patients have reported unsatisfactory esthetic results that can demand surgical revision [6]. Large excision volume is a well-studied risk factor for a poor esthetic outcome [712], the risk increasing if the resection exceeds 15–20% of the breast volume [7, 8, 12]. In the medial part of the breast, less of the breast volume can be resected with preserved esthetics (5%) [9]. Beyond possible asymmetry, deformity can also arise due to tissue necrosis, especially in fatty breasts, caused by large dual-plane mobilizations to cover the resected portion [13]. Tumor location in the medial, inferior, or central parts of the breast is also related to lower satisfaction after BCT [10, 11, 14, 15]. In addition, postoperative radiotherapy (PRT) can accentuate a suboptimal esthetic result by substantial and unpredictable shrinkage [1618]. Other observed risk factors for lower patient satisfaction after BCT have been high body mass index (BMI) [12, 14], axillary clearance [12], postoperative complications [11, 12, 14], reoperative procedures [10, 12, 14], adjuvant chemotherapy [15], large scars after resection [10], and how the patient perceived the preoperative information and possibility to participate in decision-making regarding surgical technique [19]. The impact of these factors has varied between studies.
Where BCT is contraindicated due to poor expected esthetic outcome, the use of oncoplastic breast-conserving surgery (OPS) has rapidly increased during the last decade [20]. OPS can allow a wider excision of the tumor, thereby ensuring safer margins and widening the possibility of breast-conserving surgery. For some women, this can spare them a mastectomy, without compromising local control. In addition, a so called oncoplastic mammoplasty (OPS with techniques similar to a reduction mammoplasty) can be performed if the patient has large breasts, and a reduction of the breast volume is beneficial to simplify PRT. After operation with a volume displacement technique, a slight asymmetry can be expected regarding size and ptosis of the breast, although the shape of the breast and centralization of the nipple is preserved [13]. As symmetry is presented to be of great importance for patient satisfaction [14, 17, 21], many breast centers also operate on the contralateral breast in the primary setting to ensure postoperative symmetry. However, there are no firm guidelines specifying in which cases contralateral surgery should be performed, and a recent interview study showed that patients accept a slight asymmetry due to concerns regarding risks with surgery and the will to preserve the untouched contralateral, healthy breast [22].
Patient-reported outcome measures (PROMs), are essential instruments to gain information regarding the patient’s experience and health-related quality of life (HR-QoL). The BREAST-Q™ questionnaires are currently the only validated, disease-specific questionnaires, designed to evaluate different aspects of HR-QoL and patient satisfaction after breast cancer surgery [23]. The BREAST-Q™ modules are used globally, and have been used in studies to compare various surgical techniques for breast cancer [24]. To date, there are five studies that have used the BREAST-Q™ BCT to evaluate results after BCT [2529]. Although some of the studies have included patients operated with various oncoplastic techniques, no study has yet evaluated a cohort of patients consistently operated with volume displacement OPS with the BREAST-Q™ BCT.

Method

Study aim

The aim of this study was to evaluate postoperative patient satisfaction, using the BREAST-Q™ BCT, after unilateral volume displacement OPS and radiotherapy, without surgery to the contralateral breast. Secondary aims were to find potential determinants for poor patient satisfaction and to assess patient wish to undergo contralateral surgery.

Participant recruitment

Women consecutively operated with unilateral oncoplastic breast-conserving surgery for malignant breast disease between 1 March 2013 and 31 December 2016 at the Skåne University Hospital in Lund were identified through a systematical search in the local surgery planning program. All patients coded with Nordic Medico-Statistical Committee (NOMESCO) classification of surgical procedures (NCSP [30]), operational code HAB40 (wedge excision of the mammary gland), were located (n = 673). Of these, 210 patients had the additional code of ZZR70 (flap of mammary gland tissue) and represented the number of women recorded as operated with volume displacement oncoplastic surgery (Fig. 1).
A review of medical charts was performed prior to study inclusion to ascertain that PRT had been completed at least 1 year prior to the study and that no surgery to the contralateral breast had been performed (Fig. 1). In total, 64 women were excluded from the study. Eight women had been incorrectly coded with ZZR70. Five women had a benign diagnosis. Twenty-seven women had been reoperated with a mastectomy: twenty-five due to positive surgical margins, one due to a local recurrence, and one had undergone prophylactic bilateral mastectomy due to a BRCA-1 mutation. Three women had not received PRT: one due to a preexisting heart condition, one declined treatment, and for one patient the histopathological analysis showed malignant phyllodes tumor, for which PRT is not indicated. Seventeen women had undergone bilateral surgery: eight women had been operated for a previous cancer, three women had bilateral cancers, and six women were operated on the contralateral breast to achieve symmetry. Four women had died prior to the study: three from metastatic breast cancer and one from a stroke. The remaining 146 women were sent the questionnaires. Two patients declined participation and were excluded, and all collected data from their medical charts were deleted.

Data collection

Data were collected regarding OPS technique, tumor size and location, postoperative complications, reoperations due to inadequate margins, pathological anatomical diagnosis, volume and weight of the specimen, tobacco use, patient age and BMI at time of surgery, and neoadjuvant and adjuvant treatment. Postoperative complications were defined by the Clavien-Dindo classification system [31]. Only complications that concerned the breast were included. Mammograms were assessed to estimate preoperative breast tissue composition and calculate breast volume. The algorithm for volume calculation uses measurements of width, w, and height, h, from the craniocaudal projection of the mammogram together with the measurement of compression, c (thickness of the breast when compressed during mammography), defining the breast as a half-elliptical cylinder; \( \mathrm{volume}\ \left({\mathrm{cm}}^3\right)=\raisebox{1ex}{$\pi $}\!\left/ \!\raisebox{-1ex}{$4$}\right.\times whc \) (cm). The method has been validated by Kalbhen et al. [32] and Kayar et al. [33]. Preoperative composition of breast tissue was evaluated by a senior consultant of radiology, who categorized the images into groups A–D, in accordance with the American College of Radiology’s Breast Imaging Reporting and Data System (BI-RADS®) 5th edition [34]. Specimens were weighed to the closest gram at the surgical theater directly after excision, before formalin fixation. Fresh specimen weight was used as a surrogate for volume in the current study, assuming that breast tissue weighs 1 g/cm3, which has been implemented in previous studies [8, 12]. Estimated percentage of breast volume excised (EPBVE) was calculated by dividing specimen weight with preoperative breast volume. Follow-up time was defined as the number of months between the date of operation and the date when the questionnaires were sent out to the individual.

Surgery and systemic treatment

OPS is used at our unit if the tumor is located caudally, medially, or centrally, or where tumor/breast volume ratio is > 20%. It is also an option at reoperation after an initial wide local excision (WLE) with positive margins. Most of the performed techniques are those presented by Clough et al. in Ann Surg Oncology 2010 [13], and most cases fall under the volume displacement category of OPS. At this kind of operation, routinely, only the cancer-burdened breast is operated in the primary setting unless a reduction mammoplasty is favorable to simplify PRT.
Preoperatively, radiological tumor location and extent was assessed with full-field digital mammography and ultrasonography. Before neoadjuvant treatment, a clip was placed in the tumor. At the preoperative multidisciplinary conference, a recommendation is made for mastectomy or breast-conserving surgery for the individual patient, but the definitive choice of breast-conserving technique and use of oncoplastic procedures is made by the surgeon who sees the patient. For non-palpable lesions, a wire was placed in the tumor or area of calcifications before surgery. Operations were performed by seven breast surgeons with training in OPS. Two consultants performed a majority of the operations, 43.1% (n = 62) and 25.7% (n = 37), respectively, with the remaining five surgeons performing 31.2% (n = 45). Patient satisfaction in relation to the surgeon was not analyzed. Sentinel node biopsy with dual technique was routinely used to assess axillary node status. Axillary clearance was performed in patients with positive lymph nodes, if not included in the SENOMIC trial [35] or randomized to no further surgery in the SENOMAC trial [36]. If the placement of the breast incision is permitted, the same incision was used for axillary surgery. Otherwise, a separate incision was made. An intraoperative X-ray of the resected specimen was performed to ensure a radiological margin of minimum 10 mm. If radiological margins were inadequate, additional tissue was excised during the same operation. Pathological evaluation of the margins by frozen section is not used routinely at our unit. Patients were treated neoadjuvantly and adjuvantly in accordance with the Swedish national guidelines for breast cancer treatment [37], involving radio-, endocrine, chemo-, and anti-HER2 therapy, depending on tumor stage and histopathological profile.

Questionnaires

The BREAST-Q™ BCT is a standardized, validated disease-specific PROM developed to evaluate patient satisfaction and HR-QoL after BCT. It is divided into nine domains for evaluation of satisfaction with breasts; adverse effects of radiation; psychosocial, physical and sexual well-being; perception of information prior to surgery; and interactions with different categories of medical staff. [23]. Patients were provided with a linguistically validated Swedish translation of the questionnaire [26].
Some questions of special interest to the current study were not included in the BREAST-Q™ BCT. Therefore, a study-specific questionnaire was constructed which included questions assessing satisfaction regarding different aspects of the operated breast, satisfaction with preoperative information, perception of ability to participate in the preoperative decision-making process, and wish for corrective surgery of either breast. Inspiration was taken from a previous study from SUS Malmö Surgical Center [26] that evaluated patient satisfaction after conventional breast-conserving surgery (BCS).

Statistical methods and data analysis

The BREAST-Q™ BCT was analyzed as complete domains with a manual scoring table provided by the developers (http://​qportfolio.​org/​breast-q/​breast-cancer/​). Raw data were thus converted to a “Q-score” ranging from 0 to 100. A high score is meant to correspond to a higher HR-QoL. Patients who answered less than 50% of the questions on a scale were excluded from that specific scale. Missing values up to 50% of the scale were replaced by calculating the mean value of the answered questions and using this as a surrogate for the missing value(s), thus completing all items of the scale.
Descriptive statistics for parametric variables were expressed as median, interquartile range (IQR), and range due to a skewed distribution in the continuous variables. Descriptive statistics for non-parametric variables were presented as frequencies and percentages. Fisher’s exact test was used to find differences between subgroups (dichotomous variables). Spearman’s rho was used to analyze correlations between different domains of the BREAST-Q™ (continuous Q-scores) and between the BREAST-Q™ (continuous Q-scores) and the study-specific questionnaire (4-point scales). The associations between Q-scores and potential determinants for lower satisfaction were analyzed by dichotomizing Q-scores with a cutoff at the median value. Logistic regression analysis was used to investigate the associations. Odds ratios (OR) with 95% confidence intervals (CI) were obtained. Associations with potential risk factors for lower satisfaction after unilateral volume displacement OPS were first analyzed in a simple logistic regression model, and thereafter in a model adjusted for BMI and age, and finally in a multiple logistic regression model including factors in which a statistically significant association had been observed in the simple logistic regression analysis.
Statistical analyses were performed using IBM® SPSS Statistics for Macintosh, Version 24.0. IBM Corp., Armonk, NY.

Results

Demographics of responding patients

Response rate was 83.3%, as 120 of the included 144 women responded (Fig. 1). One patient answered only the study-specific questionnaire, and the remaining 119 answered both questionnaires. Patient, tumor, and treatment characteristics for the total cohort and for responders and non-responders, respectively, are shown in Table 1. For responding patients, median age at operation was 61 (33–80) years and median BMI 25.2 (16.0–42.0) kg/m2, median follow-up time 28 (15–54) months, median radiological and histological tumor extents (including malignant microcalcifications and DCIS) were 20 (5–60) mm and 22 (6–90) mm, respectively, specimen weight 92 (14–345) grams and EPBVE 15% (3–35%).
Table 1
Patient, tumor, and therapy characteristics. All values are presented as median (range) or percentage (count) of subgroup
 
Total cohort (n = 144)
Responders (n = 120)
Non-responders (n = 24)
Age (years)
60 (32–80)
61 (33–80)
52 (32–79)
BMI (kg/m2)
25.1 (16.0–42.0)d
25.2 (16.0–42.0)
24.2 (19.7–34.6)
Smoker
14.0% (n = 20)
11.8% (n = 14)
25.0% (n = 6)
Radiological tumor extent (mm)
20 (5–60)
20 (5–60)
25 (6–60)
Histological tumor extent (mm)
23 (6–90)
22 (6–90)
25 (10–51)
Specimen weight (g)
86 (14–345)e
92 (14–345)
62 (33–161)
Breast volume (cm3)a
644 (110–2033)f
644 (110–2033)
637 (200–1395)
EPBVE (%)b
14 (3–35)g
15 (3–35)
13 (7–28)
Oncoplastic method
 Raquet
49.3% (n = 71)
54.2% (n = 65)
25.0% (n = 6)
 Round block
21.5% (n = 31)
20.0% (n = 24)
29.2% (n = 7)
 V-mammoplasty
13.2% (n = 19)
10.8% (n = 13)
25.0% (n = 6)
 Inverted-T
7.6% (n = 11)
7.5% (n = 9)
8.3% (n = 2)
 J-mammoplasty
6.9% (n = 10)
6.7% (n = 8)
8.3% (n = 2)
 Other
1.4% (n = 2)
0.8% (n = 1)
4.2% (n = 1)
Axillary clearance
27.8% (n = 40)
30.0% (n = 36)
16.7% (n = 4)
Re-excision
4.9% (n = 7)
4.2% (n = 5)
8.3% (n = 2)
Postoperative complications of the breastc
 Grade 1
2.1% (n = 3)
2.5% (n = 3)
0
 Grade 2
2.1% (n = 3)
0.8% (n = 1)
8.3% (n = 2)
 Grade 3
1.4% (n = 2)
1.7% (n = 2)
0
Neoadjuvant chemotherapy
17.4% (n = 25)
17.5% (n = 21)
16.7% (n = 4)
Adjuvant chemotherapy
25.0% (n = 36)
26.7% (n = 32)
16.7% (n = 4)
Adjuvant endocrine therapy
72.2% (n = 104)
74.2% (n = 89)
62.5% (n = 15)
Postoperative radiotherapy
100% (n = 144)
100% (n = 120)
100% (n = 24)
Breast density
 High (BI-RADS® C–D)
30.6% (n = 55)
54.2% (n = 13)
35.0% (n = 42)
 Low (BI-RADS® A–B)
62.5% (n = 89)
45.8% (n = 11)
65.0% (n = 78)
Follow-up time (months)
27 (15–54)
28 (15–54)
24 (15–54)
BMI body mass index, EPBVE estimated percentage of breast volume excised, BI-RADS® Breast Imaging Reporting and Data System
aBreast volume calculated from mammograms by height × width × compression (cm) × π/4
bEPBVE calculated by dividing specimen weight with breast volume
cComplications defined by the Clavien-Dindo classification [31]
dOne missing value in the “non-responder” group
eEight missing values, out of which seven were in the “responder” group and one in the “non-responder”
fTwo missing values in the “responder” group
gTen missing values, out of which nine were in the “responder” group and one in the “non-responder” group

Surgical and treatment specifications of responding patients

The most frequent technique, the Raquet oncoplasty, was used in 54.2% of the patients (n = 65). Axillary clearance was performed in 25.0% (n = 30). Two women were reoperated with OPS after an initial WLE with insufficient margins. Five women (4.2%) were re-excised after the initial OPS with insufficient margins, with a final result of BCT. Neoadjuvant chemotherapy was administered to 17.5% (n = 21). Adjuvant chemo- and endocrine therapy were given to 26.7% (n = 32) and 74.2% (n = 89), respectively. All women received PRT.

Complications of responding patients

Six women (5.0%) had complications from the breast area (Table 1): three grade 1 complications (one hematoma and two minor skin necroses), one grade 2 complication (infection treated with antibiotics), and two grade 3b complications (reoperation due to postoperative bleeding). Due to infection, adjuvant radiotherapy was delayed by three weeks in one case.

Patient satisfaction

The median Q-scores of the BREAST-Q™ BCT domains were for “Satisfaction with breast” 74/100 (IQR 59–85), “Psychosocial well-being” 87/100 (IQR 57–100), and “Sexual well-being” 60/100 (IQR 40–69). Of the women, 97.5–100% answered more than half of the BREAST-Q™ BCT domains, with an exception for “Sexual QoL”, in which the completion percentage was 64.7% (Table 2).
Table 2
Q-scores for BREAST-Q™ BCT Domains
Domain
n
Median
IQR
Range
Mean (SD)
1. Satisfaction with breasts
119
74
59–85
12–100
72 (20)
2. Adverse effects of radiation
118
100
89–100
49–100
94 (11)
3. Psychosocial well-being
119
87
57–100
14–100
78 (23)
4. Sexual well-being
77
60
40–69
0–100
55 (21)
5. Physical well-being
119
78
69–92
21–100
78 (18)
6. Satisfaction with information from breast surgeon
119
75
58–100
37–100
76 (19)
7. Satisfaction with breast surgeon
118
100
92–100
23–100
92 (14)
8. Satisfaction with medical team
118
100
100–100
31–100
96 (12)
9. Satisfaction with office staff
116
100
100–100
44–100
97 (9)
Number of responders and descriptive statistics of Q-scores from domains of the BREAST-Q™ BCT
IQR interquartile range, SD standard deviation, n number of responders (maximum 119 patients since one of the 120 responding patients only answered the study-specific questionnaire)
In the study-specific questionnaire, 88.3% (n = 106) of the women were satisfied or very satisfied with the appearance of the operated breast, 86.7% (n = 104) with the size of the operated breast, 88.3% (n = 106) with the shape of the operated breast, 78.3% (n = 94) with the symmetry between the operated and untouched breast, 90.8% (n = 109) with the nipple-areolar complex (NAC) positioning, 85.8% (n = 103) with the appearance of the NAC, 83.3% (n = 100) with the scar, and 79.2% (n = 95) with skin sensitivity (Table 3).
Table 3
Descriptive statistics of answers to the study-specific questionnaire
Expectations, information, participation in decision-making
 
Not at all
Partly
Almost entirely
Entirely
Missing
Has the operation met your expectations regarding the cosmetic outcome?
1 (0.8%)
8 (6.7%)
30 (25.0%)
79 (65.8%)
2 (1.7%)
Did you receive enough information about the expected cosmetic outcome?
6 (5.0%)
14 (11.7%)
24 (20.0%)
74 (61.7%)
2 (1.7%)
Did you perceive an opportunity to participate in the decision making process?
20 (16.7%)
16 (13.3%)
20 (16.7%)
62 (51.7%)
2 (1.7%)
Satisfaction with different aspects of the operated breast
 
Dissatisfied
Not entirely satisfied
Satisfied
Very satisfied
Missing
Appearance of the operated breast
4 (3.3%)
10 (8.3%)
42 (35.0%)
64 (53.3%)
0
Size of the operated breast
4 (3.3%)
11 (9.2%)
46 (38.3%)
58 (48.3%)
1 (0.8%)
Shape of the operated breast
3 (2.5%)
10 (8.3%)
47 (39.2%)
59 (49.2%)
1 (0.8%)
NAC positioning
2 (1.7%)
8 (6.7%)
44 (36.7%)
65 (54.2%)
1 (0.8%)
NAC appearance
2 (1.7%)
12 (10.0%)
46 (38.3%)
57 (47.5%)
3 (2.5%)
Symmetry
6 (5.0%)
19 (15.8%)
50 (41.7%)
44 (36.7%)
1 (0.8%)
Appearance of scar
4 (3.3%)
13 (10.8%)
47 (39.2%)
53 (44.2%)
3 (2.5%)
Skin sensitivity
5 (4.2%)
18 (15.0%)
56 (46.7%)
39 (32.5%)
2 (1.7%)
Wish regarding additional/corrective/other surgery
 
No
Yes
Missing
Would you rather have removed the entire breast?
114 (95.0%)
3 (2.5%)
3 (2.5%)
Would you like to have corrective surgery of the operated breast?
109 (90.8%)
8 (6.7%)
3 (2.5%)
Would you like to have a procedure of the contralateral breast for symmetry?
101 (84.2%)
13 (10.8%)
6 (5.0%)
NAC nipple areolar complex
Scores for the study-specific questionnaire, presented as count and percentage of responding patients in brackets
Determinants for patient satisfaction in the BREAST-Q™ BCT domain “Satisfaction with breast” below median value (Q-score < 74) in the crude logistic regression analysis were found to be specimen weight > 100 g, axillary clearance, neoadjuvant therapy, and breasts with low density (BI-RADS® A-B). The factors that remained significant when adjusted for age and BMI were axillary clearance (OR 2.46, 95% CI 1.09–5.56), neoadjuvant chemotherapy (OR 3.26, 95% CI 1.15–9.24), and low breast density (OR 2.32, 95% CI 1.02–5.29) (Table 4). No independent risk factors were found in the multiple logistic regression model (Table 5).
Table 4
Logistic regression model of potential risk factors for lower patient satisfaction
Factor
Q-score ≥ 74
Q-score < 74
OR (95% CI)a
OR (95% CI)b
BMI (kg/m2)
 < 25
31 (54.4%)
26 (45.6%)
1
1
 ≥ 25 to < 30
21 (47.7%)
23 (52.3%)
1.31 (0.59–2.87)
1.28 (0.58–2.84)
 ≥ 30
9 (50.0%)
9 (50.0%)
1.19 (0.41–3.44)
1.18 (0.40–3.46)
Age (years)
 < 50
18 (56.3%)
14 (43.8%)
1
1
 50–65
21 (46.7.7%)
24 (53.3%)
1.47 (0.59–3.66)
1.44 (0.58–3.60)
 > 65
22 (52.4%)
20 (47.6%)
1.17 (0.46–2.95)
1.14 (0.45–2.91)
BI-RADS® classification of breast density
 High density(C–D)
27 (64.3%)
15 (35.7%)
1
1
 Low density (A–B)
34 (44.2%)
43 (55.8%)
2.28 (1.05–4.94)
2.32 (1.02–5.29)
Smoker
 No
53 (52.5%)
48 (47.5%)
1
1
 Yes
4 (28.6%)
10 (71.4%)
2.76 (0.81–9.38)
2.59 (0.74–9.12)
EPBVE (%)c
 < 15
31 (50.8%)
30 (49.2%)
1
1
 ≥ 15
25 (51.0%)
24 (49.0%)
0.99 (0.47–2.11)
1.00 (0.45–2.21)
Specimen weight (grams)
 < 100
40 (58.8%)
28 (41.2%)
1
1
 ≥ 100
17 (38.6%)
27 (61.4%)
2.27 (1.05–4.93)
2.23 (0.99–5.06)
Axillary clearance
 No
48 (57.8%)
35 (42.2%)
1
1
 Yes
13 (36.1%)
23 (63.9%)
2.43 (1.08–5.44)
2.46 (1.09–5.56)
Neoadjuvant chemotherapy
 No
55 (56.1%)
43 (43.9%)
1
1
 Yes
6 (28.6%)
15 (71.4%)
3.20 (1.15–8.93)
3.26 (1.15–9.24)
Adjuvant chemotherapy
 No
47 (54.0%)
40 (46.0%)
1
1
 Yes
14 (43.8%)
18 (56.3%)
1.51 (0.67–3.42)
1.54 (0.67–3.52)
Adjuvant endocrine therapy
 No
15 (48.4%)
16 (51.6%)
1
1
 Yes
46 (52.3%)
42 (47.7%)
0.86 (0.38–1.94)
0.82 (0.35–1.89)
BI-RADS® Breast Imaging Reporting and Data System, EPBVE estimated percentage of breast volume excised, BMI body mass index
aSimple logistic regression model. OR > 1 equals higher likelihood for lower satisfaction (Q-score under median value in the BREAST-Q™ BCT domain “Satisfaction with breast”). Presented as fitted model with 95% CI in brackets. Text in italics highlights statistically significant values
bMultiple logistic regression model, factor adjusted for age and BMI
cDivided at median value of responding patients
Table 5
Multiple logistic regression model including factors showing a statistically significant association in the simple logistic regression model
Factor
Q-score ≥ 74
Q-score < 74
OR (95% CI)a
OR (95% CI)b
BMI (kg/m2)
 < 25
31 (54.4%)
26 (45.6%)
1
1
 ≥ 25 to  < 30
21 (47.7%)
23 (52.3%)
1.28 (0.58–2.84)
1.21 (0.50–2.90)
 ≥ 30
9 (50.0%)
9 (50.0%)
1.18 (0.40–3.46)
1.08 (0.32–3.68)
Age (years)
 < 50
18 (56.3%)
14 (43.8%)
1
1
 50–65
21 (46.7.7%)
24 (53.3%)
1.44 (0.58–3.60)
1.06 (0.39–2.93)
 > 65
22 (52.4%)
20 (47.6%)
1.14 (0.45–2.91)
0.81 (0.28–2.33)
BI-RADS® classification of breast density
 High density (C–D)
27 (64.3%)
15 (35.7%)
1
1
 Low density (A–B)
34 (44.2%)
43 (55.8%)
2.32 (1.02–5.29)
2.00 (0.79–5.06)
Axillary clearance
 No
48 (57.8%)
35 (42.2%)
1
1
 Yes
13 (36.1%)
23 (63.9%)
2.46 (1.09–5.56)
1.57 (0.52–4.72)
Neoadjuvant chemotherapy
 No
55 (56.1%)
43 (43.9%)
1
1
 Yes
6 (28.6%)
15 (71.4%)
3.26 (1.15–9.24)
3.02 (0.70–13.12)
Specimen weight (grams)
 ≤ 100
40 (58.8%)
28 (41.2%)
1
1
 > 100
17 (38.6%)
27 (61.4%)
2.23 (0.99–5.06)
1.45 (0.59–3.54)
BI-RADS® Breast Imaging Reporting and Data System, BMI body mass index
aModel where the factor is adjusted for age and BMI. OR > 1 equals higher likelihood for lower satisfaction (Q-score under median value in the BREAST-Q™ BCT domain ‘Satisfaction with breast’). Presented as fitted model with 95% CI in brackets, adjusted for BMI and age. Text in italics highlights statistically significant values
bMultiple logistic regression model where all factors shown were adjusted for each other

Wish for contralateral surgery

Thirteen of the responding women (11%) expressed interest for a contralateral operation. Median time since surgery was 30 months for these women (range 17–53), and in most cases, they had previously not expressed a wish (n = 5) for contralateral surgery at clinical follow-up. In some cases (n = 4), the patients had too high BMI to be subjected to a contralateral reduction mammaplasty according to the National Guidelines. In two cases, there was an indication for contralateral surgery according to both the surgeon and patient; however, a decision to further await contralateral surgery was made, since the effects of postoperative radiotherapy and/or endocrine therapy were expected to further affect the breast. One patient had the clinical follow-up at the oncological department and had therefore not been in contact with the surgical department. One patient was on the waiting list for a contralateral procedure.
The women who wished to have contralateral surgery for symmetry reported a higher frequency of dissatisfaction regarding the size and shape of the operated breast and with postoperative symmetry between the breasts (Table 6).
Table 6
Satisfaction with different aspects of the operated breast for patients who wished to have contralateral surgery for symmetry
Would you like to have a procedure of the contralateral breast for symmetry?a
Satisfaction with aspect of the operated breasta
Yes (n = 13)
No (n = 101)
p value
Satisfiedb
Dissatisfied
Satisfied
Dissatisfied
Appearance of the operated breast
10 (76.9%)
3 (23.1%)
92 (91.1%)
9 (8.9%)
0.139
Size of the operated breast
8 (66.7%)
4 (33.3%)
92 (91.1%)
9 (8.9%)
0.032*
Shape of the operated breast
8 (66.7%)
4 (33.3%)
94 (93.1%)
7 (6.9%)
0.017*
NAC positioning
10 (83.3%)
2 (16.7%)
94 (93.1%)
7 (6.9%)
0.224
NAC appearance
8 (72.7%)
3 (27.3%)
90 (89.1%)
11 (10.9%)
0.140
Symmetry
4 (33.3%)
8 (66.7%)
86 (85.1%)
15 (14.9%)
< 0.001*
Appearance of scar
9 (69.2%)
4 (30.8%)
86 (86.9%)
13 (13.1%)
0.109
Skin sensitivity
7 (58.3%)
5 (41.7%)
82 (82.0%)
18 (18.0%)
0.068
Descriptive statistics of dichotomized answers from the study-specific questionnaire, sub grouped into women who wished to have contralateral surgery compared to those who did not. Presented as count, percentage of sup group in brackets
Fishers exact test was used to find differences between patients who wished to have contralateral surgery for symmetry and those who did not. p value < 0.05 is considered to represent a significant difference between groups
aNo missing values were included
bSatisfied defined as score of “satisfied” or “very satisfied” and dissatisfied defined as a score of “not entirely satisfied” or “dissatisfied” for the aspect of the operated breast evaluated

Correlation between “Satisfaction with breasts” and other BREAST-Q™ BCT domains

The domain “Satisfaction with breasts” had positive correlation coefficients with all other BREAST-Q™ BCT domains. “Sexual well-being” was found to have the highest correlation (Spearman’s rho = 0.584, moderate) and “Psychosocial well-being” the second highest correlation (rho = 0.562, moderate). Correlations are presented in Table 7 along with p values.
Table 7
Correlation between “Satisfaction with breast” and other BREAST-Q™ BCT domains
 
Other BREAST-Q™ BCT domains
Correlation
Interpretationa
p value
1. Adverse effects of radiation
0.186
Very weak
0.043*
2. Psychosocial well-being
0.562
Moderate
< 0.001*
3. Sexual well-being
0.584
Moderate
< 0.001*
4. Physical well-being
0.389
Weak
< 0.001*
5. Satisfaction with information from breast surgeon
0.441
Moderate
< 0.001*
6. Satisfaction with breast surgeon
0.214
Weak
0.020*
7. Satisfaction with medical team
0.228
Weak
0.013*
8. Satisfaction with office staff
0.182
Very weak
0.051
Correlation analysis performed using Spearman’s correlation assessing rank correlation between BREAST-Q™ BCT domain 1 “Satisfaction with breasts” and remaining domains
aSpearman’s correlation coefficient (rho) measures the strength of the monotonic relationship between paired data and may lie between − 1 and 1. 0–0.19 = very weak, 0.2–0.39 = weak, 0.4–0.59 = moderate, 0.6–0.79 = strong, 0.8–1 = very strong. *p < 0.05 is considered a statistically significant correlation

Discussion

During the last decade, the use of oncoplastic surgery has increased rapidly. Intentions have been to widen the implementation of BCT, thus avoiding mastectomy or increasing patient satisfaction in challenging cases [13, 20]. The BREAST-Q™ questionnaires are currently the only available validated and disease-specific PROMs for subjective auto-evaluation after breast cancer surgery. To our knowledge, there are to date five published studies that have used BREAST-Q™ BCT, two of them evaluating OPS [23, 27] and the other three evaluating non-specified BCS [2426]. Out of these studies, Dahlbäck et al. [24] and O’Connell et al. [25] are considered appropriate for comparison since they presented median values and had the highest response rates (Table 8).
Table 8
Previous studies evaluating patient satisfaction/QoL with the BREAST-Q™ BCT compared to the current study
 
First author of study
Dahlbäck*
O’Connell**
Current study
Year published
2017
2016
 
Evaluated surgical method(s)
BCT/WLE
BCT/WLE
OPS
Time period when operations were performed
2008–2012
2009–2015
2013–2016
Response rate
71%
58%
83%
Number of responding participants
348
200
120
Radiological tumor extent (mm)
15 (median value)
16 (mean value)
20 (median value)
Weight of specimen excised (grams)
32.5 (mean value)
86 (median value)
Breast Q™ BCT domains
 “Satisfaction with breasts”
66 (57–80)a
68 (55–80)
74 (59–85)
 “Effects of radiotherapy”
100 (89–100)
89 (78.25–100)
100 (89–100)
 “Psychosocial well-being”
82 (61–100)
82 (63–100)
87 (57–100)
 “Sexual well-being”
60 (48–79)
57 (45–66)
60 (49–69)
 “Physical well-being”
81 (69–92)
75 (64–86)
78 (69–92)
 “Satisfaction with information from breast surgeon”
62 (53–84)
77 (64–100)
75 (58–100)
 “Satisfaction with breast surgeon”
100 (81–100)
100 (100–100)
100 (92–100)
 “Satisfaction with medical team”
100 (92–100)
100 (100–100)
100 (100–100)
 “Satisfaction with office staff”
100 (93–100)
100 (100–100)
100 (100–100)
Summary of the three studies using BREAST-Q™ BCT that have presented median or mean values for one or several domains
BCT breast-conserving therapy, OPS oncoplastic surgery, WLE wide local excision
aValues are median and interquartile range in brackets
*Dahlback et al. 2017 [26]
**O’Connell et al. 2016 [27]
Even though tumor extent and resected specimen weight were larger in the current study, the median Q-score of the BREAST-Q™ domain “Satisfaction with breasts” was higher than the Q-scores presented by O’Connell and Dahlbäck et al. [26, 27]. A slightly higher median Q-score was also found in the domain “Psychosocial well-being,” and it was also slightly higher or equal in the domain “Sexual well-being” in the current study compared to the other studies. These three domains are considered most likely to be affected by a poor esthetic outcome, supported by the fact that the domains “Psychosocial well-being” and “Sexual well-being” showed the highest rate of correlation with the domain “Satisfaction with breast” in our study. “Satisfaction with breast” correlated poorly with how participants perceived their contacts with medical care professionals, suggesting that patients are able to dissociate the different aspects of their treatment when responding to the questionnaire. Similar correlation coefficients were found by O’Connell et al. In similarity to both other studies, the domain “Sexual well-being” had a lower response rate than the other domains [26, 27]. One reason might be that many women are no longer sexually active, as they chose not to answer questions regarding “Sexual well-being” by marking “not applicable.” A difference between the comparable study cohorts, apart from surgical technique (OPS in the current study compared to different and mixed methods of BCT), is that patients in the other two studies were treated during time periods prior to the current study (O’Connell et al. 2009–2015, Dahlbäck et al. 2008–2012). Since the use of OPS has increased during the latest years, perhaps some patients in these other cohorts should have received OPS, if current recommendations had been present then.
In the current study cohort, many previously studied potential risk factors for lower patient satisfaction after BCT did not significantly affect the OR of having a Q-score of the BREAST-Q™ BCT domain “Satisfaction with breast” below the median value. Regarding the impact of EPBVE, women that had a resection of > 15% of the breast were as likely to be satisfied as the women where < 15% of the breast had been removed. This indicates that a high EPBVE not necessarily impairs the esthetic outcome if techniques of OPS are used and that OPS can thus be beneficial when large resections are necessary. Axillary clearance, neoadjuvant chemotherapy, resected weight > 100 g, and low breast density were associated with lower patient satisfaction in the univariate analysis, and all but specimen weight remained statistically significant when adjusted for age and BMI. However, when tested in a multiple logistic regression model, no independent risk factors were found. One reason for this may be that many of the factors covariate. For example, all but one patient who received neoadjuvant chemotherapy were also operated in the axilla, and patients with low-density breasts tended to have larger breasts, why they were more likely have had resections of > 100 g. It is thereby difficult to differentiate the true impact of the factors studied, since the number of study individuals is too low to make representative subgroups. In a larger study group, significant values would more likely have been found. Further studies evaluating risk factors for lower patient satisfaction and negative effects on HR-QoL after OPS are therefore suggested.
A majority of the women treated with oncoplastic volume displacement techniques did not express a wish for a contralateral procedure for symmetry. This finding supports the approach to offer contralateral surgery in the primary setting only in selected cases, and otherwise as a secondary procedure after individual assessment. Since PRT can cause unpredictable changes to the breast [17, 18], it might be better to wait until the 1-year follow-up visit to see if contralateral surgery is needed. Achieving a better long-term symmetrical appearance when the “template,” in form of the cancer-treated breast, has reached its final outcome could be easier than trying to predict the change over time and compensate for this in the primary setting. Bilateral surgery also demands higher health care costs due to longer operating time and/or more surgeons. In Sweden, as in other countries with a tax-financed healthcare system, the awareness of costs and benefits for healthcare procedures has to be especially high. In addition, effects of contralateral surgery, such as influencing future detection of an eventual later contralateral cancer negatively [38], scars and potential loss of sensation to the areola and increased risk of peri- and postoperative complications [39], must also be taken into consideration.
The strengths of the study include the use of a validated questionnaire, which limits the researcher’s imposition. In addition, efforts to remove confounders were made. All patients received PRT, which is a well-known factor that could compromise esthetic outcome. Also, all patients had a contralateral untouched breast, meaning that they could compare the operated breast to an untouched one. This enabled them to be their own controls, to see if the goal of preserving the natural shape and size of the breast was achieved. Another strength in this study was the high response rate. As for most questionnaire-based studies, selection bias cannot be completely ruled out. Perhaps very dissatisfied and very satisfied patients are more prone to respond than patients in the middle of the spectrum, giving more extreme results for the responders compared to the total cohort. Further limitations of the study include the lack of a control group with patients operated with other methods of BCT. The results of this study were therefore compared to groups of women in other studies, with different methods of surgery and postoperative treatment. The current cohort did not include patients operated with volume reduction mammoplasty, i.e., patients selected for this type of oncoplastic procedure were excluded from the material. Since these operations usually are performed bilaterally, perhaps some patients who wanted bilateral surgery from the start were enrolled to volume reduction surgery instead of volume displacement surgery for that reason. In addition, six patients subjected to oncoplastic displacement surgery had been operated with bilateral surgery to achieve symmetry. These patients could not be included in the current study, since the objective was for the patient to compare the operated breast to an untouched one. With only six patients, it would have been difficult to draw any reliable conclusions, why no further analyses were attempted for this group in this material. However, this poses a risk of selection bias in the current cohort, since these patients in fact were not satisfied with unilateral surgery. Also, due to the retrospective design of this study, only the postoperative BREAST-Q™ BCT module was used. Since the BREAST-Q™ BCT has a preoperative module, it would have been valuable to create a baseline measurement, to illustrate the change of well-being pre- and postoperatively. Especially in the psychosocial and sexual domains, in which a change in the patients view of herself, psychological health or sexuality are aspects of interest.
In this study, the patients’ level of satisfaction and aspects of HR-QoL were the primary end-points. As these results are subjective, it could be valuable to evaluate the esthetic result also by more objective evaluation modalities, such as software-based methods (for example BCCT.core [40, 41]), in future studies.

Conclusion

In this study cohort of breast cancer patients, treated unilaterally with oncoplastic volume displacement surgery and with an untouched contralateral breast, the median Q-score of the BREAST-Q™ domain “Satisfaction with breast” was slightly higher than those presented in other previously published studies evaluating BCS with BREAST-Q™, despite larger resections. The results indicate that oncoplastic volume displacement techniques can be beneficial in the surgical treatment of breast cancer for selected patients. In this study, no independent risk factor for lower patient satisfaction was identified. Larger study cohorts are needed to further investigate potential risk factors for lower patient satisfaction after oncoplastic surgery. Most patients in the current study were not interested in a contralateral procedure. In patients treated with oncoplastic volume displacement surgery, contralateral surgery for symmetry is suggested to be performed only after individual evaluation and as a delayed procedure.

Acknowledgements

The authors would like to thank Professor Jonas Manjer for the valuable help with statistical methods and input on the manuscript and Dr. Rogví Wintherheig Rasmussen for the guidance in how to measure volume and for evaluating the breast density from mammography images.
BREAST-Q™ copyright notice: Memorial Sloan Kettering Cancer Center and the University of British Columbia, 2006, all rights reserved. Contact information and permission to use:
MAPI Research Trust, Lyon, France (qportfolio.​org; qportfolioteam@gmail.​com).
The Ethics Committee of Lund University approved the study (DNR 2018/50).
Informed written consent was retrieved from all individual participants included in the study.
Not applicable

Competing interests

The authors declare that they have no competing interests.
Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://​creativecommons.​org/​licenses/​by/​4.​0/​), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://​creativecommons.​org/​publicdomain/​zero/​1.​0/​) applies to the data made available in this article, unless otherwise stated.

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Metadaten
Titel
Patient satisfaction after unilateral oncoplastic volume displacement surgery for breast cancer, evaluated with the BREAST-Q™
verfasst von
Anna Gardfjell
Cecilia Dahlbäck
Kristina Åhsberg
Publikationsdatum
01.12.2019
Verlag
BioMed Central
Erschienen in
World Journal of Surgical Oncology / Ausgabe 1/2019
Elektronische ISSN: 1477-7819
DOI
https://doi.org/10.1186/s12957-019-1640-6

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