Choice of surgical treatment approach in patients with metastatic colorectal cancer complicated by intestinal obstruction

Denis S. Shvets , Oleg I. Kaganov , Andrey E. Orlov , Alexey M. Kozlov , Sergey A. Frolov , Nikita I. Mikolenko

Russian Journal of Oncology ›› 2023, Vol. 28 ›› Issue (4) : 177 -187.

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Russian Journal of Oncology ›› 2023, Vol. 28 ›› Issue (4) : 177 -187. DOI: 10.17816/onco624168
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Choice of surgical treatment approach in patients with metastatic colorectal cancer complicated by intestinal obstruction

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Abstract

BACKGROUND: Every year more than 1 million new cases of colorectal cancer are diagnosed worldwide, with approximately 30% patients already having distant metastases. Colorectal cancer is often complicated, which makes chemotherapy challenging or, in some cases, impossible, therefore worsening the prognosis. As the first step, such patients need to undergo surgical treatment, in order to eliminate existing complications. However, what volume of surgery remains a discussion point among ongologists: a colostomy or a cytoreductive r2 resection to remove the primary tumor.

AIM: To analyze the results of complex treatment in patients with metastatic colorectal cancer and to optimize surgical treatment approaches.

MATERIALS AND METHODS: We conducted a study in Samara regional clinical Oncology dispensary (Samara, Russia), which included patients with metastatic colorectal cancer complicated by intestinal obstruction. Before treatment, all patients were examined according with current clinical standards. Subsequently, the patients were divided into two groups: the first group included patients who underwent cytoreductive surgery (r2 resection to remove the primary lesion due to the presence of colonic obstruction), and the second group included patients who underwent palliative surgery (colostomy or a bypass anastomosis in order to eliminate intestinal obstruction without removing the primary tumor).

RESULTS: We found that postoperative complications in patients who had undergone primary tumor removal were significantly more prevalent. At the same time, however, the number of complications at the stage of chemotherapy, combined with angiogenesis inhibitor therapy, was significantly greater than in the group of patients in whom primary lesion was not removed. Complications that arose during chemotherapy affected the number of chemotherapy cycles performed. Discontinuation of chemotherapy affected event-free and overall survival.

CONCLUSION: Timely identification and elimination of existing complications by removing the primary tumor focus before chemotherapy is an important component of an individual approach in order to develop treatment optimal tactics for patients with metastatic colorectal cancer.

Keywords

metastatic colorectal cancer / intestinal obstruction / adverse events / palliative surgery / cytoreductive R2 resection

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Denis S. Shvets, Oleg I. Kaganov, Andrey E. Orlov, Alexey M. Kozlov, Sergey A. Frolov, Nikita I. Mikolenko. Choice of surgical treatment approach in patients with metastatic colorectal cancer complicated by intestinal obstruction. Russian Journal of Oncology, 2023, 28(4): 177-187 DOI:10.17816/onco624168

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Самарский областной клинический онкологический диспансерSamara Regional Clinical Oncology Dispensary

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