Haemoperitoneum as an indicator of GIST.

We report the case of a 62-year-old woman who presented to the emergency department with abdominal pain and distension. She was diagnosed with haemoperitoneum and a large tumour that occupied the entire left hypochondrium and attached to the posterior surface of the fundus of the stomach at the level of the greater curvature. Anatomical pathology examination identified the tumour as a gastrointestinal stromal tumour with highly malignant characteristics and the haemoperitoneum was considered to contribute to a worse prognosis because of its ability to produce a peritoneal seeding. Considering these adverse characteristics, imatinib was initiated as an adjuvant treatment, with no evidence of relapse in the follow-up.