MONDO_0003297 (gallbladder leiomyoma) is a benign smooth muscle neoplasm arising from the gallbladder. It is characterized by the presence of spindle cells with cigar-shaped nuclei, interlacing fascicles, and a whorled pattern. Also known as: gall bladder leiomyoma, leiomyoma of gall bladder, leiomyoma of gallbladder, leiomyoma of the gallbladder.