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New grade-related prognostic variable for rectal cancer
G Gagliardi1, K A Stepniewska, M J Hershman
1Department of Surgery, St Mark's Hospital, London, UK.
The British Journal of Surgery
|May 1, 1995
Summary
Microacinar growth patterns in rectal cancer significantly reduce 5-year survival rates compared to macroacinar patterns. This microacinar classification offers independent prognostic value beyond traditional staging methods.
Area of Science:
- Oncology
- Surgical Pathology
Background:
- Rectal cancer prognosis relies on staging and histological grading.
- Tumor acinar size is a potential, yet underutilized, prognostic factor.
Purpose of the Study:
- To assess the prognostic impact of microacinar versus macroacinar growth patterns on survival after rectal cancer surgery.
- To determine if acinar size provides independent prognostic value alongside established classifications.
Main Methods:
- Retrospective analysis of 138 rectal cancer patients undergoing radical surgery.
- Tumor acini classified as microacinar or macroacinar.
- Survival analysis incorporating Dukes staging, Jass classification, and acinar size.
Main Results:
- Patients with microacinar tumors showed a significantly lower 5-year survival rate (43%) compared to macroacinar tumors (68%, P=0.004).
- Microacinar size demonstrated independent prognostic value (RR 2.37, P=0.006), even when controlling for Dukes and Jass staging.
Conclusions:
- Histological classification of rectal tumors into microacinar and macroacinar types enhances prognostic accuracy.
- Acinar size offers a potentially more objective prognostic criterion than conventional histological grading for rectal cancer.