Malignant peritoneal mesothelioma is a rare lethal malignancy of the serosal membranes of the peritoneum. The pathogenesis and association is strongly related with industrial pollutants asbestos, but less than pleural mesothelioma. Symptoms are nonspecific and related to the tumor spread within the abdominal cavity. CT scan is the investigation of choice and mostly disease is discovered incidentally on routine imaging. Diagnosis is confirmed on histopathology as well as immunohistochemical analysis of markers. The mainstay of treatment is cytoreductive surgery with Hyperthermic intraperitoneal chemotherapy. Here we present a very unusual case of malignant peritoneal mesothelioma diagnosed on routine evaluation of a 62 year old male admitted in emergency for obstructed inguinal hernia.