title: [Schwannoma originating from the obturator nerve with suspicion of lymph node metastasis].
abstract: A 58-year-old man, received polypectomy to evaluate the polyp of sigmoid colon. Pathological examination of the specimen revealed non-invasive adenocarcinoma. Systemic work up including abdominal computed tomography (CT) demonstrated a bladder tumor 11 x 18 mm in diameter associated with left obturator lymph node swelling (16 x 14 mm). In the preoperative staging, this nodule was suspected to be lymph node metastasis, even though both cancers were diagnosed to be early stage. Transurethral resection of bladder tumor (TUR-Bt) and lymph node open biopsy were performed. The final diagnosis of bladder tumor was pTa, urothelial cancer grade 2 and low grade. The nodule had originated from the obturator nerve itself, and pathological diagnosis demonstrated benign schwannoma. To the best of our knowledge, this is the 14th report of benign schwannoma of the obturator nerve in Japan.
authors.affiliation: The Department of Nephrourologic Surgery and Andrology, Mie University Graduate School of Medicine.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Sasaki
authors.forename: Norihito
authors.initials: N
authors.lastname: Soga
authors.forename: Manabu
authors.initials: M
authors.lastname: Miki
authors.forename: Satoru
authors.initials: S
authors.lastname: Masui
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Hasegawa
authors.forename: Hideki
authors.initials: H
authors.lastname: Kanda
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Yamada
authors.forename: Hideaki
authors.initials: H
authors.lastname: Kise
authors.forename: Kiminobu
authors.initials: K
authors.lastname: Arima
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Sugimura
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D008207:Lymphatic Metastasis / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D009378:Neoplasms, Multiple Primary / Q000473:pathology*; D009442:Neurilemmoma / Q000473:pathology*; D009776:Obturator Nerve; D010524:Peripheral Nervous System Neoplasms / Q000473:pathology*; D001749:Urinary Bladder Neoplasms / Q000473:pathology*