title: Laparoscopic resection of a retroperitoneal schwannoma located in the hepatic hilus.
abstract: Schwannomas are tumors and commonly occur in the head and neck region; however, they rarely present in the retroperitoneum. A 79-year-old man was admitted to our hospital for a follow-up of a tumor in the hepatic hilus. A 2.8 × 2.5 cm solid tumor located between the hepatic hilus and common hepatic artery was originally identified, and the size of the tumor had increased from 2.0 × 2.0 cm to 2.8 × 2.5 cm over the course of 3 years. The patient underwent percutaneous sonopsy, and the tumor was subsequently diagnosed as a benign schwannoma. Since the patient wished to undergo an operation, we performed laparoscopic surgery. During the operation, the tumor was detected in the retroperitoneal space, where it was strongly adhered between the left gastric artery and common hepatic artery. At this point, no major vessels had vascularized the tumor. We then completely removed the tumor from the retroperitoneal space without any complications. The clinical course was uneventful, and the patient was discharged on postoperative day 4 without any symptoms. Later, a definitive histopathologic examination revealed a benign schwannoma. Here, we report this rare case of a retroperitoneal schwannoma located in the hepatic hilus.
authors.affiliation: Department of Surgery, Numazu City Hospital, Shizuoka, Japan. maruyamaatenza@hotmail.co.jp.|Numazu City Hospital, Aza Haru no Ki 550, Higashi Shiiji, Numazu shi, Shizuoka, Japan. maruyamaatenza@hotmail.co.jp.
authors.forename: Tetsuro
authors.initials: T
authors.lastname: Maruyama
authors.affiliation: Department of Surgery, Numazu City Hospital, Shizuoka, Japan. numazucityhosp@yahoo.co.jp.
authors.forename: Yuji
authors.initials: Y
authors.lastname: Sugamoto
authors.affiliation: Department of Gastroenterology, Numazu City Hospital, Shizuoka, Japan. d.miyagi@na.commufa.jp.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Miyagishima
authors.affiliation: Department of Surgery, Numazu City Hospital, Shizuoka, Japan. tfuk_ya@yahoo.co.jp.
authors.forename: Toru
authors.initials: T
authors.lastname: Fukunaga
authors.affiliation: Department of Surgery, Numazu City Hospital, Shizuoka, Japan. kentasaki_numazuch@yahoo.co.jp.
authors.forename: Kentaro
authors.initials: K
authors.lastname: Tasaki
authors.affiliation: Department of Surgery, Numazu City Hospital, Shizuoka, Japan. ntakeshita1225@gmail.com.
authors.forename: Nobuyoshi
authors.initials: N
authors.lastname: Takeshita
authors.affiliation: Department of Surgery, Numazu City Hospital, Shizuoka, Japan. fd3s301298@hotmail.com.
authors.forename: Tomohide
authors.initials: T
authors.lastname: Tamachi
authors.affiliation: Department of Pediatric Surgery, Numazu City Hospital, Shizuoka, Japan. fs97yo@yahoo.co.jp.
authors.forename: Yo
authors.initials: Y
authors.lastname: Asai
authors.affiliation: Department of Pediatric Surgery, Numazu City Hospital, Shizuoka, Japan. jikan-gensyu@hotmail.co.jp.
authors.forename: Takashi
authors.initials: T
authors.lastname: Hosokawa
authors.affiliation: Department of Surgery, Numazu City Hospital, Shizuoka, Japan. er.ninomy@themis.ocn.ne.jp.
authors.forename: Eiichiro
authors.initials: E
authors.lastname: Ninomiya
authors.affiliation: Department of Surgery, Numazu City Hospital, Shizuoka, Japan. fujito_hiromichi@yahoo.co.jp.
authors.forename: Masayuki
authors.initials: M
authors.lastname: Kimura
keywords: Laparoscopic resection; Preoperative diagnosis; Retroperitoneal schwannoma