The main histopathologic features showed the mucosal hyperplasia forming many Rokitansky-Aschoff (R-A) sinus and hypertrophy of the muscular layer.

• 组织学特征为胆囊黏膜上皮增生、上皮陷于肌层或浆膜下形成数量较多的罗-阿氏窦、以及肌层增生肥厚。