[A benign smooth muscle neoplasm arising from an extrahepatic bile duct. It is characterized by the presence of spindle cells with cigar-shaped nuclei, interlacing fascicles, and a whorled pattern. ( NCI )]
UMLS (NCI) C1333507Leiomyoma of Extrahepatic Bile Duct
Leiomyoma of the Extrahepatic Bile Duct