Histopathologic prognostic score in colorectal adenocarcinomas

Area of Science:

• Oncology
• Pathology
• Surgical Oncology

Background:

• Colorectal adenocarcinoma prognosis relies on various pathological factors.
• Accurate risk stratification is crucial for post-curative resection management.
• Existing prognostic models may not fully capture all relevant histopathological nuances.

Purpose of the Study:

• To evaluate the prognostic significance of specific pathological variables in large bowel adenocarcinoma.
• To develop and validate a prognostic score based on independent prognostic factors.
• To identify patient subgroups with differing risks of relapse after curative surgery.

Main Methods:

• Prospective analysis of histopathological features from 292 resected colorectal tumors (Astler-Coller stages B-C).
• Cox's proportional regression analysis to determine independent prognostic factors.
• Development of a prognostic score based on significant variables: bowel wall invasion, peritumoral lymphocytic infiltration, positive lymph nodes, and vascular invasion.

Main Results:

• Four variables demonstrated independent prognostic value: extent of bowel wall invasion, peritumoral lymphocytic infiltration, number of positive nodes, and vascular invasion.
• A prognostic score stratified patients into four groups with distinct 5-year disease-free survival rates (ranging from 24.4% to 94%).
• The score effectively identified low-risk and high-risk populations within Astler-Coller B2 tumors (p = 0.002).

Conclusions:

• A prognostic score derived from four histopathological parameters accurately predicts relapse risk in colorectal adenocarcinoma.
• This score facilitates the identification of patient groups requiring closer monitoring or tailored therapeutic strategies.
• The tumor phenotype evaluation through this score improves prognostic accuracy after curative resection.