RT Journal Article T1 Survival analysis and sentinel lymph node status in thin cutaneous melanoma: A multicenter observational study. A1 Tejera-Vaquerizo, Antonio A1 Ribero, Simone A1 Puig, Susana A1 Boada, Aram A1 Paradela, Sabela A1 Moreno-Ramírez, David A1 Cañueto, Javier A1 de Unamuno, Blanca A1 Brinca, Ana A1 Descalzo-Gallego, Miguel A A1 Osella-Abate, Simona A1 Cassoni, Paola A1 Carrera, Cristina A1 Vidal-Sicart, Sergi A1 Bennássar, Antoni A1 Rull, Ramón A1 Alos, Llucìa A1 Requena, Celia A1 Bolumar, Isidro A1 Traves, Víctor A1 Pla, Ángel A1 Fernández-Orland, A A1 Jaka, Ane A1 Fernández-Figueres, María T A1 Hilari, Josep M A1 Giménez-Xavier, Pol A1 Vieira, Ricardo A1 Botella-Estrada, Rafael A1 Román-Curto, Concepción A1 Ferrándiz, Lara A1 Iglesias-Pena, Nicolás A1 Ferrándiz, Carlos A1 Malvehy, Josep A1 Quaglino, Pietro A1 Nagore, Eduardo A1 SENTIMEL group, K1 Cox proportional hazards regression analysis K1 age factors K1 melanoma K1 mitotic index K1 multiple imputation K1 neoplasia staging K1 prognostic factors K1 sentinel lymph node biopsy K1 survival AB Mitotic rate is no longer considered a staging criterion for thin melanoma in the 8th edition of the American Joint Committee on Cancer Staging Manual. The aim of this observational study was to identify prognostic factors for thin melanoma and predictors and prognostic significance of sentinel lymph node (SLN) involvement in a large multicenter cohort of patients with melanoma from nine tertiary care hospitals. A total of 4249 consecutive patients with thin melanoma diagnosed from January 1, 1998 to December 31, 2016 were included. The main outcomes were disease-free interval and melanoma-specific survival for the overall population and predictors of SLN metastasis (n = 1083). Associations between survival and SLN status and different clinical and pathologic variables (sex, age, tumor location, mitosis, ulceration, regression, lymphovascular invasion, histologic subtype, Clark level, and Breslow thickness) were analyzed by Cox proportional hazards regression and logistic regression. SLN status was the most important prognostic factor for melanoma-specific survival (hazard ratio, 13.8; 95% CI, 6.1-31.2; P 2 mitoses/mm2 was the only factor associated with a positive SLN biopsy (odds ratio, 2.9; 95% CI, 1.22-7; P = 0.01. SLN status is the most important prognostic factor in thin melanoma. A high mitotic rate is associated with metastatic SLN involvement. SLN biopsy should be discussed and recommended in patients with thin melanoma and a high mitotic rate. YR 2019 FD 2019-06-18 LK http://hdl.handle.net/10668/14139 UL http://hdl.handle.net/10668/14139 LA en DS RISalud RD Apr 8, 2025