title: Rare presentation of retroperitoneal schwannoma: a case report.
abstract: The deadly Schwannomas, as uncommon subtype of soft tissue tumors originate from peripheral nerve sheaths. Retro peritoneum is an uncommon site for these tumors. Here we present the clinical feature and therapeutic implication of a 38-year-old man affected by recurrent retroperitoneal schwannoma who admitted to emergency ward following abdominal pain. Computed Tomorgraphic Scan showed a solid well-differentiated heterogeneous mass, 8.5x6 cm size in portahepatis beneath liver and right periumbilical .On laboratory tests Cancer Antigen 19-9 and Cancer Embryonic Antigen were in normal range. In surgery, a 7x8cm round mass was discovered at juxta renal juxta duodenal retro peritoneum, It was completely adhered to second part of duodenum with no signs of infiltration of the liver and right kidney, unable to simply being enucleated, curative resection was performed by classical whipple procedure. The patient`s hospitalization course was uneventful and on the second week he was discharged from the hospital with complete recovery. Due to the high recurrent rate of retroperitoneal Schwannomas even in benign circumstances, radical resection would be the treatment of choice.
authors.affiliation: Dept. of General and Vascular Surgery, Shahid Beheshti University of Medical Sciences, Tehran, Iran ; Cancer Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Mohammad
authors.initials: M
authors.lastname: Mozafar
authors.affiliation: Dept. of General and Vascular Surgery, Shahid Beheshti University of Medical Sciences, Tehran, Iran ; Cancer Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Saran
authors.initials: S
authors.lastname: Lotfollahzadeh
authors.affiliation: Dept. of General and Vascular Surgery, Shahid Beheshti University of Medical Sciences, Tehran, Iran ; Cancer Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Khashayar
authors.initials: K
authors.lastname: Atqiaee
authors.affiliation: Dept. of General and Vascular Surgery, Shahid Beheshti University of Medical Sciences, Tehran, Iran ; Cancer Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
authors.forename: Farideh
authors.initials: F
authors.lastname: Adhamy
keywords: Retroperitoneal neoplasm; Schwannoma; Whipple procedure