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Updated: Jul 7, 2025

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Recurrence Patterns and Risk Factors after Curative Resection for Colorectal Cancer: Insights for Postoperative

Hyo Seon Ryu1, Jin Kim1, Ye Ryung Park1

  • 1Division of Colon and Rectal Surgery, Department of Surgery, Korea University College of Medicine, 73 Goryeodae-ro, Sungbuk-gu, Seoul 02841, Republic of Korea.

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Summary
This summary is machine-generated.

Understanding colorectal cancer (CRC) recurrence is key. This study found peak recurrence at 11 months, with rectal cancer showing higher rates, guiding better surveillance strategies.

Keywords:
colorectal cancerliver metastasislung metastasisperitoneal metastasisrecurrencerisk factorssurveillance

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Area of Science:

  • Oncology
  • Surgical Oncology
  • Gastroenterology

Background:

  • Colorectal cancer (CRC) recurrence after curative resection poses a significant clinical challenge.
  • Identifying patterns and risk factors for CRC recurrence is essential for optimizing patient management.
  • Current surveillance strategies require refinement based on robust recurrence data.

Purpose of the Study:

  • To analyze recurrence patterns following curative resection in colorectal cancer (CRC) patients.
  • To identify prognostic factors associated with CRC recurrence.
  • To determine the peak recurrence time after surgery.

Main Methods:

  • Retrospective observational study of 2622 stage I-III CRC patients undergoing curative resection (2008-2018).
  • Analysis of recurrence patterns, including locoregional and systemic recurrence rates.
  • Calculation of hazard rates using a hazard function to determine peak recurrence time.

Main Results:

  • Overall recurrence rate was 8.9% over a median 53-month follow-up.
  • Rectal cancer exhibited significantly higher recurrence rates (14.9%) compared to colon cancer.
  • Peak recurrence time was observed at 11 months, with early high hazard rates for patients with AL or CRM involvement.

Conclusions:

  • Recurrence patterns vary significantly based on tumor location (rectal vs. colon) and stage.
  • Short-interval surveillance in the first two years post-surgery is recommended, especially for high-risk patients.
  • Understanding specific recurrence timelines and risk factors can improve postoperative surveillance and patient outcomes.