Vascular leiomyoma of the superior mesenteric vein.
D000368:Aged; D005260:Female; D006801:Humans; D007889:Leiomyoma / Q000000981:diagnostic imaging / Q000473:pathology*; D008642:Mesenteric Veins; D009131:Muscle, Smooth, Vascular / Q000473:pathology*; D009369:Neoplasms / Q000000981:diagnostic imaging / Q000473:pathology*; D011859:Radiography