Background data: Gastrointestinal stromal tumors (GIST) are considered the most common group of non-epithelial neoplasms of stomach and small bowel.
Objective: To present a case report and literature review.
Method: Sixty-seven year-old white male with abdominal mass and gastrointestinal bleeding. Laboratory and X-ray test were done resulting in gastric leiomyosarcoma suspect.
Results: Patient underwent to exploratory celiotomy with subtotal gastrectomy with splenectomy. Immunohistochemistry results confirms gastrointestinal stromal tumor diagnosis of the stomach.