Prognostic factors in Merkel cell carcinoma patients undergoing sentinel node biopsy

Area of Science:

• Oncology
• Surgical Pathology

Background:

• Prognostic factors for primary Merkel cell carcinoma (MCC) require further clarification.
• Investigating clinicopathological determinants of survival in MCC patients undergoing sentinel node biopsy is crucial.

Purpose of the Study:

• To identify significant prognostic factors for survival in patients with primary Merkel cell carcinoma (MCC).
• To evaluate the impact of clinicopathological variables, including sentinel lymph node biopsy status, on MCC patient outcomes.

Main Methods:

• Retrospective analysis of 64 consecutive MCC patients from a prospectively maintained database.
• Survival outcomes analyzed using product limit estimators and proportional hazards models.
• Investigation of predictors including age, gender, tumor site/size, residual disease, and sentinel node status.

Main Results:

• Lower limbs were the most common primary tumor site (56.3%); 67.2% of lesions were ≤2 cm.
• Residual disease after excision was present in 28% of cases; 26.6% had positive sentinel nodes.
• Only the presence of residual tumor after wide local excision was significantly associated with survival (p=0.03).

Conclusions:

• The presence of residual tumor following wide local excision is the primary prognostic indicator in Merkel cell carcinoma.
• Sentinel lymph node status, age, gender, and primary tumor characteristics were not significant predictors of survival in this cohort.