Abstract
Introduction
Incidence of peritoneal carcinomatosis (PC) after curative resection of stage II and III colon cancer varies widely. Although certain features are considered high risk for PC, the impact of these features on PC incidence is unclear.
Methods
A retrospective analysis was performed on patients ≥ 18 years old with resected stage II and III colonic adenocarcinoma treated at two academic institutions from 2007 to 2018. Clinicopathologic features, treatment and outcomes data were recorded. Patients with reported high-risk features (pT3N0-2 with mucinous/signet ring components, pT4, pN1c, perforation) were identified. The remaining stage II and III patients were used for comparison.
Results
Of 219 eligible patients, 93/219 (42.5%) were stage II and 126/219 (57.5%) were stage III. Median follow-up time was 25 (1–146) months. Adjuvant systemic treatment was administered to 133/219 (60.7%) patients. Overall incidence of PC was 14/219 (6.4%) and the median time to PC was 18 (1–37) months. The high-risk and comparison groups contained 113 and 106 patients, respectively. Incidence of PC was significantly different between groups (high-risk 9.7% vs comparison 2.8%, p = 0.04). Median time to PC was not significantly different between the groups [high-risk 17 (1–37) months vs comparison 20 (7–36) months, p = 0.88].
Conclusion
Overall PC incidence in patients with resected stage II and III colon cancer was 6.4%. Although the high-risk group developed PC at a significantly higher rate, the rate of PC in this group was still below 10%. The results of this study represent real-world rates of PC and should be taken into account when designing future studies.
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Dr. Pigazzi serves as consultant for Medtronic, Ethicon and Vioptix.
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Choi, A.H., Farzaneh, C., Kejriwal, N. et al. Rate of Peritoneal Carcinomatosis in Resected Stage II and III Colon Cancer. Ann Surg Oncol 27, 4943–4948 (2020). https://doi.org/10.1245/s10434-020-08689-y
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DOI: https://doi.org/10.1245/s10434-020-08689-y