Relationship Between Mast Cell Population of Microenvironment and Prognosis in Colorectal Cancer

Area of Science:

• Oncology
• Immunology
• Pathology

Background:

• Mast cells are key players in the tumor microenvironment, influencing cancer progression.
• Their role in colorectal cancer (CRC) is complex, potentially promoting or inhibiting tumor growth.
• Inflammation's link to CRC development is increasingly recognized.

Purpose of the Study:

• To investigate the association between stromal mast cell density and prognostic factors in CRC patients.
• To determine if mast cell count can predict patient outcomes after surgery.

Main Methods:

• Retrospective analysis of 81 CRC patients who had curative surgical resection.
• Immunohistochemical staining for mast cell tryptase (MCT) to quantify mast cells in tumor stroma.
• Correlation analysis of mast cell density with clinicopathological parameters and survival outcomes (PFS, OS).

Main Results:

• A mast cell count of ≥22 cells/HPF was identified as high mast cell density (MCC-H).
• High MCC independently predicted improved overall survival (OS) (HR: 0.07, p=0.039).
• Lymph node involvement and tumor perforation were independent predictors of progression-free survival (PFS).

Conclusions:

• Stromal mast cell count is an independent prognostic factor for OS in CRC patients.
• Mast cell count (MCC) may serve as a valuable prognostic biomarker post-surgical resection.
• MCC could assist in stratifying patients by postoperative risk.