title: [Hemangiopericytoma as a cause of massive gastrointestinal hemorrhage].
mesh_terms: D006471:Gastrointestinal Hemorrhage / Q000209:etiology*; D006393:Hemangiopericytoma / Q000150:complications*; D006801:Humans; D008297:Male; D008875:Middle Aged; D013274:Stomach Neoplasms / Q000150:complications*
vernacular_title: Haemangiopericitoma przyczyna masywnego krwawienia z przewodu pokarmowego.