title: Retroperitoneal Schwannoma in the Renal Hilum: A Case Report.
abstract: A 73-year-old male was referred to our department for further treatment of a right retroperitoneal tumor. Contrast CT showed a tumor mass measuring 33 × 26 mm in size with poor contrast enhancement. Because we were unable to rule out tumor malignancy, we planned an operation. The tumor was easily separated and removed without nephrectomy. Histological study revealed a schwannoma. It is rare for this kind of tumor to arise from the retroperitoneum (approximately 0.7% of all cases), in particular at the renal hilum. We herein report a rare case of retroperitoneal schwannoma arising from the renal hilum.
authors.affiliation: Department of Urology and Renal Transplantation, Yokohama City University Medical Center, Yokohama, Japan.
authors.forename: Yohei
authors.initials: Y
authors.lastname: Kumano
authors.affiliation: Department of Urology and Renal Transplantation, Yokohama City University Medical Center, Yokohama, Japan ; Department of Urology, Yokohama City University Graduate School of Medicine, Yokohama, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Kawahara
authors.affiliation: Department of Diagnostic Pathology, Yokohama City University Medical Center, Yokohama, Japan.
authors.forename: Sawako
authors.initials: S
authors.lastname: Chiba
authors.affiliation: Department of Urology and Renal Transplantation, Yokohama City University Medical Center, Yokohama, Japan.
authors.forename: Yoko
authors.initials: Y
authors.lastname: Maeda
authors.affiliation: Department of Urology and Renal Transplantation, Yokohama City University Medical Center, Yokohama, Japan.
authors.forename: Mari
authors.initials: M
authors.lastname: Ohtaka
authors.affiliation: Department of Urology and Renal Transplantation, Yokohama City University Medical Center, Yokohama, Japan.
authors.forename: Takuya
authors.initials: T
authors.lastname: Kondo
authors.affiliation: Department of Urology and Renal Transplantation, Yokohama City University Medical Center, Yokohama, Japan.
authors.forename: Taku
authors.initials: T
authors.lastname: Mochizuki
authors.affiliation: Department of Urology and Renal Transplantation, Yokohama City University Medical Center, Yokohama, Japan.
authors.forename: Yusuke
authors.initials: Y
authors.lastname: Hattori
authors.affiliation: Department of Urology and Renal Transplantation, Yokohama City University Medical Center, Yokohama, Japan.
authors.forename: Jun-Ichi
authors.initials: J
authors.lastname: Teranishi
authors.affiliation: Department of Urology and Renal Transplantation, Yokohama City University Medical Center, Yokohama, Japan.
authors.forename: Yasuhide
authors.initials: Y
authors.lastname: Miyoshi
authors.affiliation: Department of Urology and Renal Transplantation, Yokohama City University Medical Center, Yokohama, Japan.
authors.forename: Yasushi
authors.initials: Y
authors.lastname: Yumura
authors.affiliation: Department of Diagnostic Pathology, Yokohama City University Medical Center, Yokohama, Japan.
authors.forename: Yoshiaki
authors.initials: Y
authors.lastname: Inayama
authors.affiliation: Department of Urology, Yokohama City University Graduate School of Medicine, Yokohama, Japan.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Yao
authors.affiliation: Department of Urology and Renal Transplantation, Yokohama City University Medical Center, Yokohama, Japan.
authors.forename: Hiroji
authors.initials: H
authors.lastname: Uemura
keywords: Renal hilum; Retroperitoneal tumor; Schwannoma