title: Ciliated foregut cyst of the gallbladder: report of a case.
abstract: We report the rare case of a gallbladder cyst arising from the foregut remnants. A 36-year-old woman was referred to our hospital after screening ultrasonography (US) detected a tumor in the gallbladder. On admission, she was well and her blood analyses were all normal. US showed a cystic mass with internal high-echoic lesions, and computed tomography (CT) demonstrated a protruding tumor with slight enhancement in the gallbladder. Angiography provided no additional information; however, sequential CT-arteriography (CTA) clearly demonstrated that this tumor was a cystic lesion. Surgical exploration was performed, first because of the difficulty in establishing a definite diagnosis, and also because the patient wanted the tumor removed. The resected specimen contained a unilocular cystic tumor that looked like a submucosal tumor. Histologically, the wall of the cyst was lined by ciliated stratified columnar epithelium with interspersed goblet cells and underlying smooth muscle fibers. The mass was finally diagnosed as a congenital ciliated foregut cyst of the gallbladder. Cysts of the gallbladder are uncommon and the majority are acquired. To our knowledge, this represents only the fourth report of a ciliated foregut cyst of the gallbladder in the literature. Although rare, an awareness of this entity could allow a preoperative diagnosis to be made, whereby surgical exploration may be avoided. CT-A is a very useful diagnostic tool, especially when the nature of the tumor presents a difficult differential diagnosis.
authors.affiliation: Department of Surgery, Kagawa Rosai Hospital, 3-3-1 Joto-cho, Marugame, Kagawa 763-0013, Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Muraoka
authors.forename: Nobuyuki
authors.initials: N
authors.lastname: Watanabe
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Ikeda
authors.forename: Yasutaka
authors.initials: Y
authors.lastname: Kokudo
authors.forename: Akihiko
authors.initials: A
authors.lastname: Tatemoto
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Sone
authors.forename: Shigeo
authors.initials: S
authors.lastname: Kagawa
authors.forename: Makoto
authors.initials: M
authors.lastname: Tsumura
authors.forename: Masaki
authors.initials: M
authors.lastname: Tsuruno
authors.forename: Junichi
authors.initials: J
authors.lastname: Kageyama
authors.forename: Kanji
authors.initials: K
authors.lastname: Kojima
authors.forename: Koichi
authors.initials: K
authors.lastname: Mizobuchi
mesh_terms: D000328:Adult; D003560:Cysts / Q000151:congenital / Q000175:diagnosis* / Q000601:surgery*; D003937:Diagnosis, Differential; D005260:Female; D005705:Gallbladder Diseases / Q000151:congenital / Q000175:diagnosis* / Q000601:surgery*; D006801:Humans; D014057:Tomography, X-Ray Computed