title: Agenesis of the Gallbladder in Monozygotic Twin Sisters.
abstract: Agenesis of the gallbladder, a rare anomaly, is generally regarded as an organogenic failure. Several reports suggest that this congenital defect is inherited but that supposition remains controversial. We described agenesis of the gallbladder in identical twins. A 21-year-old female presented with a history of acute pain in the epigastrium and right hypochondrium. Various imaging modalities showed "gallbladder agenesis." Moreover, her older identical twin sister had also no visualized gallbladder in imaging modalities. This case report strongly suggested that agenesis of the gallbladder would be caused by a genetic abnormality.
authors.affiliation: Department of Gastroenterology, Aizu Medical Center, Fukushima Medical University, 21-2 Maeda, Tanisawa, Kawahigashi, Aizuwakamatsu 969-3492, Japan.
authors.forename: Koki
authors.initials: K
authors.lastname: Hoshi
authors.affiliation: Department of Gastroenterology, Aizu Medical Center, Fukushima Medical University, 21-2 Maeda, Tanisawa, Kawahigashi, Aizuwakamatsu 969-3492, Japan.
authors.forename: Atsushi
authors.initials: A
authors.lastname: Irisawa
authors.affiliation: Department of Gastroenterology, Aizu Medical Center, Fukushima Medical University, 21-2 Maeda, Tanisawa, Kawahigashi, Aizuwakamatsu 969-3492, Japan.
authors.forename: Goro
authors.initials: G
authors.lastname: Shibukawa
authors.affiliation: Department of Gastroenterology, Aizu Medical Center, Fukushima Medical University, 21-2 Maeda, Tanisawa, Kawahigashi, Aizuwakamatsu 969-3492, Japan.
authors.forename: Akane
authors.initials: A
authors.lastname: Yamabe
authors.affiliation: Department of Gastroenterology, Aizu Medical Center, Fukushima Medical University, 21-2 Maeda, Tanisawa, Kawahigashi, Aizuwakamatsu 969-3492, Japan.
authors.forename: Mariko
authors.initials: M
authors.lastname: Fujisawa
authors.affiliation: Department of Gastroenterology, Aizu Medical Center, Fukushima Medical University, 21-2 Maeda, Tanisawa, Kawahigashi, Aizuwakamatsu 969-3492, Japan.
authors.forename: Ryo
authors.initials: R
authors.lastname: Igarashi
authors.affiliation: Department of Gastroenterology, Aizu Medical Center, Fukushima Medical University, 21-2 Maeda, Tanisawa, Kawahigashi, Aizuwakamatsu 969-3492, Japan.
authors.forename: Ai
authors.initials: A
authors.lastname: Sato
authors.affiliation: Department of Gastroenterology, Aizu Medical Center, Fukushima Medical University, 21-2 Maeda, Tanisawa, Kawahigashi, Aizuwakamatsu 969-3492, Japan.
authors.forename: Takumi
authors.initials: T
authors.lastname: Maki