Leiomyoblastoma: varied CT appearance.

Leiomyoblastoma is an uncommon tumor of the stomach. Usually exogastric in site, the tumor may grow to a significant size before it becomes symptomatic. Various appearances of the tumor include cystic and solid forms as well as a combination of both. Tumor hypervascularity may be identified on computed tomography (CT). The development of calcification in this tumor is rare. Late recurrence of the tumor may occur. The differential diagnosis should include leiomyosarcoma, leiomyoma, pancreatic pseudocyst, and cystadenoma.