[Fever of unknown origin as the clinical presentation of malignant peritoneal mesothelioma].

Malignant peritoneal mesothelioma is a rare disease. The most frequent initial symptoms are abdominal pain, anorexia, marked weight loss and ascites. Clinical presentation as fever of unknown origin is exceptional. We report three cases diagnosed over a period of twenty years, two cases as fever of unknown origin and the third as prolonged fever. Three patients died within two months after diagnosis and prolonged fever was the clinical manifestation at the onset of the disease. It is important to take malignant peritoneal mesothelioma in the differential diagnosis of fever unknown origin.