An uncommon gastric tumour: leiomyoma associated with osteochondroma

The case of a 65-year-old man having a large gastric tumor for about 6 years, revealed echographically, is reported. A well delimited consistent white-grey tumor of 8 x 6 x 2.5 cm occurring in the anterior wall of the stomach that extended to the peritoneal cavity was surgically found. Histologically it showed leiomyomatous zones with fascicular spindle cells and sometimes with perinuclear vacuolizations, which were actin-reaction positive but S-100 protein negative. These zones alternated with large compact benign osteochondromatous zone. The uncertain origin of this uncommon tumor was discussed. We have not found any references to such gastric tumors.