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Clinically Node Negative, Pathologically Node Positive Rectal Cancer Patients Who Did Not Receive Neoadjuvant Therapy

  • 2016 SSAT Plenary Presentation
  • Published:
Journal of Gastrointestinal Surgery Aims and scope

Abstract

Purpose

Neoadjuvant chemoradiotherapy is the preferred standard of care for clinical stages II–III rectal cancer. It is uncertain whether clinically node negative (cN−) tumors found to be pathologically stage III could be optimally treated with surgery alone and avoid adjuvant treatments. The aim of our study was to define the outcomes of such patients.

Methods

Patients undergoing radical surgery using total mesorectal excision (TME) techniques for rectal cancer (≤12 cm from the anal verge) with curative intent during 2000–2012 and found to have stage III disease on final pathology were identified from a prospectively maintained database. Patients were staged with abdominopelvic CT, transrectal endoscopic ultrasound, and/or pelvic MRI. Exclusion criteria were cN+ without neoadjuvant chemoradiotherapy, hereditary colorectal syndromes, inflammatory bowel diseases, lack of preoperative nodal staging, intraoperative radiotherapy, and follow-up <3 years. We compared cN−/pN+ patients according to the postoperative treatment received (group 1 if no further treatment, group 2 if any postoperative treatments), using ypN+ patients (neoadjuvant chemoradiotherapy + surgery) as controls (group 3). Oncological outcomes evaluated included overall survival (OS), disease-specific survival (DSS), disease-free survival (DFS), local recurrence (LR), and distant recurrence (DR).

Results

Out of 218 patients included in the study, 77 cN− patients underwent initial surgery with a pN+ surgical specimen. Eighteen of these patients received no postoperative treatment due to associated comorbidity, patient preference, or postoperative complications while the remaining 59 (group 2) patients received chemoradiotherapy (n = 21) or chemotherapy alone (n = 38), respectively, and group 3 included 141 patients. Distal, radial resection margins and TME grading when available were comparable among groups. cN−/pN+ patients treated with surgery alone were associated with significantly poorer cancer outcomes compared with cN−/pN+ patients who received any form of adjuvant therapy and to ypN+ patients.

Conclusion

TME surgery is not sufficient to optimize outcomes among rectal cancer patients believed to be node negative and found to be stage III based on specimen pathology.

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Authors and Affiliations

  1. Department of Colorectal Surgery, Cleveland Clinic, Desk A 30, 9500 Euclid Ave. A30, Cleveland, OH, 44195, USA

    Nouf Akeel, Nan Lan, Luca Stocchi, Meagan M. Costedio, David W. Dietz, Emre Gorgun, Matthew F. Kalady, Georgios Karagkounis, Hermann Kessler & Feza H. Remzi

  2. Department of Surgery, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia

    Nouf Akeel

Authors
  1. Nouf Akeel
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  2. Nan Lan
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  3. Luca Stocchi
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  4. Meagan M. Costedio
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Correspondence to Luca Stocchi.

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All the authors have contributed to the design of the study, analysis, or interpretation of data and drafting the work and approved the manuscript for publication.

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Akeel, N., Lan, N., Stocchi, L. et al. Clinically Node Negative, Pathologically Node Positive Rectal Cancer Patients Who Did Not Receive Neoadjuvant Therapy. J Gastrointest Surg 21, 49–55 (2017). https://doi.org/10.1007/s11605-016-3301-1

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  • DOI: https://doi.org/10.1007/s11605-016-3301-1

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