title: Mesothelial cyst of the liver in a neonate.
abstract: Mesothelial cysts are very rare congenital cystic lesions that are derived from coelomic remnants. We report a neonate with a mesothelial cyst of hepatic origin. On routine antenatal ultrasound study, an intra-abdominal mass was seen. After birth, the cystic lesion's size increased to 8 cm and became symptomatic. Surgical resection was performed. Preoperative diagnostic imaging studies, including CT and MRI, did not identify the etiology, but the cyst appeared to be of hepatic origin. Intra-operatively, the cystic lesion was confirmed to have originated from the liver. Based on immunohistological analysis, the final diagnosis was mesothelial cyst of the liver.
authors.affiliation: Department of Pediatric Surgery, Keio University, School of Medicine, 35 Shinanomachi, Shinjuku, Tokyo 1608582, Japan.
authors.forename: Koji
authors.initials: K
authors.lastname: Komori
authors.forename: Ken
authors.initials: K
authors.lastname: Hoshino
authors.forename: Junichi
authors.initials: J
authors.lastname: Shirai
authors.forename: Yasuhide
authors.initials: Y
authors.lastname: Morikawa
mesh_terms: D005260:Female; D005865:Gestational Age; D006801:Humans; D007150:Immunohistochemistry; D007231:Infant, Newborn; D008113:Liver Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D008279:Magnetic Resonance Imaging; D018261:Mesothelioma, Cystic / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D010534:Peritoneal Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000601:surgery; D011247:Pregnancy; D016896:Treatment Outcome; D016216:Ultrasonography, Prenatal