2016 Volume 30 Issue 4 Pages 723-730
A 60-year-old male with a tumor of the gallbladder that was detected by screening ultrasonography (US) was referred to our hospital for workup. US revealed a pedunculated polyp at the fundus of gallbladder and diffuse thickened wall of the gallbladder. We followed it on the diagnosis of cholesterol polyp and cholesterosis. During the follow-up period, the polyp tended to enlarge and change morphologically. Since adenoma or gallbladder carcinoma in situ could be considered as a diagnosis of the polyp based on various images, a laparoscopic cholecystectomy was carried out. Resected specimen revealed a light yellowish pedunculated polyp at the fundus of gallbladder and cholesterosis. Histologically, it was covered with a simple epithelium with low-grade atypia and was composed of mucinous edematous stroma with few infiltration of foamy cells in lamina propria, and finally diagnosed as a fibrous polyp. This is a rare case with a fibrous polyp of the gallbladder and has been suspected to change from a cholesterol polyp.
