Clinical Report: Colon cancer at the splenic flexure may represent a unique prognostic category

Overview

This study identifies splenic flexure colon cancer (SFCC) as a distinct prognostic subtype associated with worse survival outcomes and heightened systemic inflammation. The composite nutrition-inflammation integrating index (NII) serves as an independent prognostic factor for overall survival in SFCC patients.

Background

Colorectal cancer (CRC) is a leading cause of cancer-related mortality, with splenic flexure colon cancer (SFCC) representing a unique anatomical and clinical entity. Understanding the distinct biological behavior and prognostic implications of SFCC is crucial for improving patient management and outcomes. This study aims to clarify the clinical characteristics and prognostic factors associated with SFCC.

Data Highlights

Key Findings

• SFCC patients exhibited significantly worse recurrence-free survival (RFS) and overall survival (OS) compared to those with transverse or descending colon cancers.
• Higher TNM stage, lymph metastasis status, large tumor size, and poor differentiation were observed in SFCC patients.
• The NII was identified as an independent prognostic factor for OS in SFCC patients.
• NII remained significantly associated with unfavorable clinical outcomes in subgroups, including those with normal CA19-9 levels and stage III disease.
• SFCC may represent a biologically distinct subtype of colon cancer linked to systemic inflammation and nutritional imbalance.

Clinical Implications

The findings suggest that clinicians should consider the unique characteristics of SFCC when assessing prognosis and treatment strategies. The NII may provide additional insights for risk stratification and individualized management of patients with SFCC.

Conclusion

SFCC is associated with aggressive pathological features and a heightened inflammatory state, warranting further investigation into its distinct clinical management. The NII may serve as a valuable tool for prognostic assessment in these patients.

Related Resources & Content

1. Author(s)/Org, Source, Year -- Title
2. Techniques in Coloproctology, 2025 -- The Arc of Riolan artery may serve as the only pathway for lymphatic metastasis in advanced splenic flexure cancer
3. Anatomical variations of the arterial supply in the colonic splenic flexure: A 3D angio-CT study and its surgical implications - ScienceDirect
4. The ASCO Post — Impact of Empirical Dietary Inflammatory Pattern on Survival Outcomes in Patients With Stage III Colon Cancer
5. dana-farber — Colon Cancer Study Presented by Sara Char, MD.
6. Colon Cancer Study Presented by Sara Char, MD.
7. ESMO Clinical Practice Guideline Express Update on the adoption of physical exercise in patients with localised colon cancer
8. Anatomical variations of the arterial supply in the colonic splenic flexure: A 3D angio-CT study and its surgical implications - ScienceDirect
9. Controlling Nutritional Status (CONUT) as a predictor of survival and complications among colorectal cancer patients: A systematic review and meta‐analysis - Vatvani - 2025 - Colorectal Disease - Wiley Online Library