[Leiomyosarcoma of the duodenum: description of a clinical case].

Leiomyosarcoma of the small bowel is a rare malignant neoplasm, representing only the 8%-22% of duodenal malignancy. Diagnosis is difficult and useful is the TC scan of upper abdomen for the localization, extension and organ origin of the neoplasm. The authors report a clinical case of leiomyosarcoma of III portion of the duodenum, arose with intestinal hemorrhage, treated surgically with duodenocephalopancreatectomy, that nowadays represent the only therapeutic treatment for these tumors.