OBJECTIVE: To analyze the different factors predictive of survival associated with optimal R0-cytoreduction in c-kit-positive gastrointestinal stromal tumors. METHODS: Thirty-five patients were operated on in our Oncological Surgery Department from January 2002 to February 2007 because of CD117/c-kit-positive gastrointestinal stromal tumors, and an optimal surgical cytoreduction was obtained without macroscopical residual disease. Demographic, anatomical, clinical, pathological, and immunohistochemical variables were analyzed from a specific database. Survival and multivariate analyses were developed using Kaplan-Meier and multiple Cox regression models, respectively. RESULTS: Five-year overall survival was 77% with a mean survival of 52 months. Risk of malignant behaviour according to Fletcher s classification and tumor size higher than 10 cm had a significantly negative influence on overall survival in the univariate analysis (p < 0.05). Proliferative Ki-67 activity higher than 50% was the only statistically significant variable in the multivariate analysis. Twenty percent of tumors recurred. Only 3 patients with metastatic disease received adjuvant treatment with imatinib mesylate, all of them with Ki-67 > 50% and currently alive. CONCLUSIONS: The poliferative Ki-67 index could represent an excellent predictive factor for survival in patients with c-kit-positive stromal gastrointestinal tumors. Confirmation and an adequate cut-off level should be the main objectives for future prospective studies, mostly focused on the appropriate selection of optimal candidates to imatinib-mesylate-based treatment.
OBJECTIVE: To analyze the different factors predictive of survival associated with optimal R0-cytoreduction in c-kit-positive gastrointestinal stromal tumors. METHODS: Thirty-five patients were operated on in our Oncological Surgery Department from January 2002 to February 2007 because of CD117/c-kit-positive gastrointestinal stromal tumors, and an optimal surgical cytoreduction was obtained without macroscopical residual disease. Demographic, anatomical, clinical, pathological, and immunohistochemical variables were analyzed from a specific database. Survival and multivariate analyses were developed using Kaplan-Meier and multiple Cox regression models, respectively. RESULTS: Five-year overall survival was 77% with a mean survival of 52 months. Risk of malignant behaviour according to Fletcher s classification and tumor size higher than 10 cm had a significantly negative influence on overall survival in the univariate analysis (p < 0.05). Proliferative Ki-67 activity higher than 50% was the only statistically significant variable in the multivariate analysis. Twenty percent of tumors recurred. Only 3 patients with metastatic disease received adjuvant treatment with imatinib mesylate, all of them with Ki-67 > 50% and currently alive. CONCLUSIONS: The poliferative Ki-67 index could represent an excellent predictive factor for survival in patients with c-kit-positive stromal gastrointestinal tumors. Confirmation and an adequate cut-off level should be the main objectives for future prospective studies, mostly focused on the appropriate selection of optimal candidates to imatinib-mesylate-based treatment.
Authors: Juan Manuel Sanchez Hidalgo; Sebastian Rufian Peña; Ruben Ciria Bru; Alvaro Naranjo Torres; Cristobal Muñoz Casares; Juan Ruiz Rabelo; Javier Briceño Delgado Journal: J Gastrointest Cancer Date: 2010-03
Authors: Juan Manuel Sanchez-Hidalgo; Manuel Duran-Martinez; Rafael Molero-Payan; Sebastian Rufian-Peña; Alvaro Arjona-Sanchez; Angela Casado-Adam; Antonio Cosano-Alvarez; Javier Briceño-Delgado Journal: World J Gastroenterol Date: 2018-05-14 Impact factor: 5.742