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30.06.2018 | Original Article | Ausgabe 12/2018

Surgery Today 12/2018

Magnetic resonance-based pelvimetry and tumor volumetry can predict surgical difficulty and oncologic outcome in locally advanced mid–low rectal cancer

Zeitschrift:
Surgery Today > Ausgabe 12/2018
Autoren:
Gulsen Atasoy, Naciye Cigdem Arslan, Funda Dinc Elibol, Ozgul Sagol, Funda Obuz, Selman Sokmen

Abstract

Purpose

To investigate the impact of the pelvic dimensions and tumor volume on surgery in locally advanced rectal cancer.

Methods

Patients who underwent open surgery after neoadjuvant long-course chemoradiation for primary rectal cancer were included. The predictive value of magnetic resonance-based pelvic measurements and tumor volume on the surgical difficulty and oncologic outcome were analyzed.

Results

125 patients were included. The independent risk factors related to the circumferential resection margin status were the pT stage [odds ratio (OR) 3.64, confidence interval (CI) 1.409–7.327] and tumor volume after neoadjuvant chemoradiotherapy (OR 1.59, CI 1.018–2.767). The operative time (p = 0.014, OR 1.453) and pelvic depth (p = 0.023, OR 1.116) were independent predictive factors for anastomotic leak. The median follow-up was 72 (2–113) months. Local recurrence was seen in 17 (14.1%) patients. Anastomotic leak (OR 1.799, CI 0.978–3.277), the circumferential resection margin status (OR 3.217, CI 1.262–7.870) and the relative tumor volume rate (OR 1.260, CI 1.004–1.912) were independent prognosticators of local recurrence. The 5-year overall survival was 66.7%. The circumferential resection margin status (hazard ratio: 4.739, CI 2.276–9.317), pN stage (OR 3.267, CI 1.195–8.930) and relative tumor volume rate (OR 2.628, CI 1.042–6.631) were independent prognostic factors for the overall survival.

Conclusions

Relative dimensions of the tumor in the pelvis influence the local recurrence and overall survival rates. Magnetic resonance-based measurements can predict the difficulty of surgery and allow surgeons to consider the appropriate surgical approach.

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