Leiomyoblastoma of the lesser omentum sac. A case report.

Localization of primary solid tumors on the omentum is rare and of leiomyoblastoma exceptional. A 57-year-old patient presented on the omentum an encapsulated, lumpy tumoral formation, 9 x 4.5 x 2.5 cm, with whitish-grey and hemorrhagic cystic zones. Predominant histopathologically were images of leiomyoblastoma infiltrated with fascicular and pleomorphic zones, recent thrombosis and hemorrhage. The postoperative evolution was satisfactory after three years.