Prognostic information from sentinel lymph node biopsy in patients with thick melanoma

Archives of Surgery
Charles R ScogginsK M McMasters

Abstract

Sentinel lymph node (SLN) biopsy provides valuable prognostic information for patients with thick (T4) melanoma. Post hoc analysis of data from a prospective, randomized trial. Academic and private hospitals. Data of 240 patients with melanoma thicker than 4 mm were analyzed. Patients with tumor-positive SLNs underwent completion lymphadenectomy. Disease-free and overall survival were evaluated by Kaplan-Meier analysis. Univariate and multivariate analyses were performed to evaluate factors predictive of tumor-positive SLNs and disease-free and overall survival. Median thickness of melanoma was 5.6 mm, and patients were followed up for a median of 50 months. The SLNs were tumor positive in 100 patients (41.7%); 18% of these had additional positive nodes on completion lymphadenectomy. Extremity tumor location (risk ratio, 1.66; 95% confidence interval, 1.24-2.24; P = .001), Clark level (1.95; 1.33-2.87; P = .02), and lymphovascular invasion (1.57; 1.13-2.17; P = .01) were associated with a greater risk of tumor-positive SLNs. The patients with tumor-negative SLNs had significantly better median disease-free survival (46.5 vs 31.0 months; P = .04) and overall survival (55.5 vs 43.0 months; P = .004) compared with patients with tu...Continue Reading

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