title: Schwannoma of the gallbladder: report of a case.
abstract: We report a schwannoma of the gallbladder in a 58-year-old man who was diagnosed as cholecystolithiasis. He presented with recurrent episodes of abdominal pain in the right upper quadrant. The abdominal computed tomography scan and ultrasonography revealed stones about 15 mm in diameter in the gallbladder. Under the diagnosis of cholecystolithiasis, laparoscopic cholecystectomy was performed. The resected specimen showed chronic cholecystitis and no suspicion of neoplasm. Pathological examination revealed that the tumor consist of spindle cells without atypical appearance at small area of fundus. Immunohistologically, tumor cells were positive for S-100 protein and negative for alpha-SMA and c-kit, the lesion was diagnosed as schwannoma.
authors.affiliation: Department of Surgery, Institute of Gastroenterologj, Kawasaki Saiwai Hospital, Kawasaki, Japan. r-ohta@saiwaihp.org
authors.forename: Ryo
authors.initials: R
authors.lastname: Ohta
authors.forename: Yudai
authors.initials: Y
authors.lastname: Hirata
authors.forename: Masataka
authors.initials: M
authors.lastname: Oneyama
authors.forename: Yasumasa
authors.initials: Y
authors.lastname: Takahashi
authors.forename: Yuichi
authors.initials: Y
authors.lastname: Kawahara
authors.forename: Masaya
authors.initials: M
authors.lastname: Kitamura
authors.forename: Manabu
authors.initials: M
authors.lastname: Goto
authors.forename: Koji
authors.initials: K
authors.lastname: Sekikawa
authors.forename: Seiichi
authors.initials: S
authors.lastname: Takenoshita
mesh_terms: D041761:Cholecystolithiasis / Q000175:diagnosis; D003951:Diagnostic Errors; D005706:Gallbladder Neoplasms / Q000175:diagnosis* / Q000378:metabolism; D006801:Humans; D008297:Male; D008875:Middle Aged; D009442:Neurilemmoma / Q000175:diagnosis* / Q000378:metabolism; D019009:Proto-Oncogene Proteins c-kit / Q000378:metabolism; D009418:S100 Proteins / Q000378:metabolism
chemical_list: D009418:S100 Proteins; D019009:Proto-Oncogene Proteins c-kit