Rectum gastrointestinal stromal tumor (GIST): case report

Abstract

Objective: This paper reports the case of a patient who underwent rectosigmoidectomy due to rectal Gastrointestinal Stromal Tumor (GIST), highlighting the therapeutic and prognostic aspects of this type of neoplasm located in an extra gastric site. Case details: Female patient 56 years old, attended at the Oncology Outpatient Clinic of Santa Casa de Misericordia de Franca due to hematochezia for about 1 month associated with difficulty in evacuating and weight loss. Complementary exams were performed, which showed an extra mucosal middle rectum lesion measuring 8.3 x 6.6 cm, with no evidence of distant lesions. She underwent a rectosigmoidectomy with primary reconstruction of the intestinal transit with anatomopathological and immunohistochemical results compatible with GIST of the rectum, followed by surveillance with serial exams without indication of adjuvant therapy. Final considerations: GIST is an uncommon neoplasm in the GIT, and its occurrence in the rectum is rare being important to highlight its high curative potential in early stages with R0 resection and adjuvant treatment. These tumors cure also depends on other factors such as size and rupture of the lesion, mitotic index and location and it requires great attention in the treatment and follow-up of these patients.