Angiography of duodenal leiomyomas and leiomyosarcomas.

Five duodenal smooth muscle neoplasms (two leiomyomas and three leiomyosarcomas) are reported. All occurred in the lower second part of the duodenum, and the angiographic findings were similar to those of myomatous tumors occurring elsewhere in the gastrointestinal tract. The leiomyomas were hypervascular with sharply demarcated margins. The leiomyosarcomas were hypervascular with sharply demarcated margins. The leiomyosarcomas were larger and less vascular than the leiomyomas and had indistinct margins. However, local invasion and metastases were definite signs of malignancy. One of the patients with a leiomyoma was examined because of active bleeding, and the hemorrhage was controlled by selective embolization.