Tumor estromal gastrointestinal: análise de fatores relacionados ao prognóstico

OBJECTIVE: study the morphologic criteria and immunohistochemical related with the prognostic of the gastrointestinal stromal tumors. METHODS: the study was retrospective of 42 cases of gastrointestinal stromal tumor (GIST). Twenty-five cases were obtained in the file of the Services of Pathological Anatomy of the Hospital Gaffree and Guinle and the other 17 of Pathological Anatomy of the Hospital Clementino Fraga Filho. RESULTS: in agreement with the univaried analysis, the tumors largest than 5 cm, with mitoses number greater than 5/50 CGA, presence of necrosis, high risk, revealed significance with regarding the reduction of the survival (P = 0.017, 0.01, 0.001 and 0.016, respectively). The other analyzed factors (histological subtype, topography and imunophenotype) they didn't show significance. CONCLUSION: the results confirm the usefulness of the risk degree, the tumorous size, the mitotic index and the necrosis as predictor factors of the biological behavior of the gastrointestinal stromal tumors.