<unk>  is a benign condition characterized by hyperplastic changes of unknown cause involving the wall of the gallbladder.<unk>  is caused by an overgrowth of the mucosa, thickening of the muscular wall, and formation of intramural diverticula or sinus tracts termed Rokitansky–Aschoff sinuses, also called entrapped epithelial crypts.
Adenomyomatosis
Verrucous carcinoma
Mammoplasia
Adenoma
Stromal tumor
Epithelial-myoepithelial carcinoma
Adenosarcoma
Epithelial dysplasia