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Erschienen in: Breast Cancer Research and Treatment 3/2021

04.01.2021 | Clinical trial

The INTEND 1 randomized controlled trial of duct endoscopy as an indicator of margin excision in breast conservation surgery

verfasst von: Gerald Gui, Effrosyni Panopoulou, Sarah Tang, Dominique Twelves, Mohammed Kabir, Ann Ward, Catherine Montgomery, Ashutosh Nerurkar, Peter Osin, Clare M. Isacke

Erschienen in: Breast Cancer Research and Treatment | Ausgabe 3/2021

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Abstract

Purpose

With early detection, breast conservation surgery with adequate surgical margins is the standard of care. The aim of this study was to evaluate the use of pre-operative duct endoscopy (DE) to target surgical resection, improve adequate margins and reduce re-excision operations.

Methods

Women with DCIS, stage I and II breast cancer suitable for breast conservation were randomized to DE-assisted wide local excision versus standard wide local excision (without DE). The primary endpoint was margin re-excision rates between the two groups. Secondary end points were: (i) volume differences of the surgical specimen; (ii) whether an extensive in situ component (EIC) influenced successful DE-guided resection.

Results

78 women were randomized: 44 patients to no-DE and 34 patients to the DE group. The median age was 59 (49–65) and 56 (48–64) years in the two groups respectively with mean follow-up of 9.1 (4.2–11.1) years. There were 23 positive findings in 17 women in 30 successful DE procedures (17/30 = 56.7%). The surgical specimen volume, no-DE (17 [IQR 10–29] cm3) and DE 20 [IQR 12–28] cm3), did not differ, p = 0.377. The overall re-excision rate was 20/78 (26%), 9 (20%) and 11 (32% in the no-DE and DE groups, respectively, p = 0.233.

Conclusions

This randomized clinical trial was limited by incomplete accrual. DE did not contribute to improved margin excision rates whether a target lesion was visualized or not. The presence of EIC did not improve efficacy of DE.
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Metadaten
Titel
The INTEND 1 randomized controlled trial of duct endoscopy as an indicator of margin excision in breast conservation surgery
verfasst von
Gerald Gui
Effrosyni Panopoulou
Sarah Tang
Dominique Twelves
Mohammed Kabir
Ann Ward
Catherine Montgomery
Ashutosh Nerurkar
Peter Osin
Clare M. Isacke
Publikationsdatum
04.01.2021
Verlag
Springer US
Erschienen in
Breast Cancer Research and Treatment / Ausgabe 3/2021
Print ISSN: 0167-6806
Elektronische ISSN: 1573-7217
DOI
https://doi.org/10.1007/s10549-020-06065-8

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