フルカワ　トオル   Furukawa Tooru   古川　徹    所属   医学部 医学科（東京女子医科大学病院）    職種   客員教授
論文種別	症例報告
言語種別	英語
査読の有無	査読あり
表題	Intracystic papillary neoplasm with an associated mucinous adenocarcinoma arising in Rokitansky-Aschoff sinus of the gallbladder.
掲載誌名	正式名：Surgical Case Reports 略　 称：Surg Case Rep ISSNコード：(2198-7793)2198-7793(Linking)
掲載区分	国外
巻・号・頁	2(1),pp.62
著者・共著者	Sato Ryuichiro†*, Ando Toshinori, Tateno Hiroo, Rikiyama Toshiki, Furukawa Toru, Ebina Nobuo
発行年月	2016/06
概要	Intraepithelial neoplasias are preinvasive neoplastic lesions found throughout in the digestive system, and when such lesions are discovered in the gallbladder, they are referred to as intracystic papillary neoplasm (ICPN). In the gallbladder, mucinous adenocarcinoma is a rare histologic phenotype, and adenocarcinomas involving Rokitansky-Aschoff (RA) sinuses are uncommon, which were indeed found in a case reported here. A 64-year-old male presenting with upper abdominal pain demonstrated a spherical mass protruding outward from the gallbladder fundus in imaging studies. Laparoscopic cholecystectomy was performed, and the resected specimen revealed a subserosal cystic mass with a small communication with the gallbladder lumen. The cystic mass contained a gelatinous material without solid component. Histologically, the mass was consisted of subserosal cysts lined by atypical columnar mucinous epithelium with micropapillary growth and nuclear stratification. The neoplastic transformation was more pronounced toward the serosal side of the lesion where disruption of the cyst wall, intrastromal mucin lakes, and invasion of the neoplastic cells into surrounding stroma were observed. The epithelium was of intestinal lineage, which was supported by the positive immunoreactivity against CDX2 and MUC2. The cystic spaces were communicated with surrounding RA sinuses, which indicated that the tumor arose in the sinus. The pathological diagnosis was ICPN, intestinal type, with an associated mucinous adenocarcinoma arising in RA sinus.
DOI	10.1186/s40792-016-0189-7
PMID	27316722