Clinical Calculator for Predicting Freedom From Recurrence After Resection of Stage I-III Colon Cancer in Patients...

Area of Science:

• Oncology
• Gastroenterology
• Cancer Research

Background:

• Patients with nonmetastatic microsatellite instability (MSI) colon cancer generally have a favorable prognosis.
• However, specific high-risk subgroups within this population require better identification for tailored management.

Purpose of the Study:

• To develop and validate a nomogram model for predicting freedom from recurrence (FFR) in patients with resected MSI colon cancer.
• To create a clinical calculator to identify patients at high risk of recurrence.

Main Methods:

• Retrospective analysis of data from 384 patients (training cohort) and 164 patients (validation cohort) with resected stage I-III MSI colon cancer.
• Multivariable analysis identified significant predictors of recurrence, including T category and lymph node status.
• Model performance was assessed using the concordance index (CI).

Main Results:

• The nomogram model demonstrated robust predictive accuracy with a CI of 0.812 in the training cohort and 0.744 in the validation cohort.
• The model outperformed the AJCC staging schema (CI 0.759) in the training cohort.
• Advanced T category and number of positive lymph nodes were significant predictors of recurrence.

Conclusions:

• The developed nomogram effectively identifies patients with MSI colon cancer at high risk for recurrence.
• This tool can inform personalized surveillance strategies and assist in the design of clinical trials for novel adjuvant therapies.
• Accurate risk stratification is crucial for optimizing treatment and follow-up in MSI colon cancer.