title: Wunderlich syndrome as the first manifestation of an extraskeletal Ewing sarcoma.
abstract: We recently encountered an extremely rare case of spontaneous perirenal hemorrhage in a 34-year-old man. He initially had undergone radical nephrectomy owing to suspicion of renal cell carcinoma. The final diagnosis was extraskeletal Ewing sarcoma.
authors.affiliation: Department of Urology, Korea University Guro Hospital, Seoul, Korea.
authors.forename: Jong Wook
authors.initials: JW
authors.lastname: Kim
authors.affiliation: Department of Urology, Korea University Guro Hospital, Seoul, Korea.
authors.forename: Ji Yun
authors.initials: JY
authors.lastname: Chae
authors.affiliation: Department of Urology, Korea University Guro Hospital, Seoul, Korea.
authors.forename: Cheol Yong
authors.initials: CY
authors.lastname: Yoon
authors.affiliation: Department of Urology, Korea University Guro Hospital, Seoul, Korea.
authors.forename: Mi Mi
authors.initials: MM
authors.lastname: Oh
authors.affiliation: Department of Urology, Korea University Guro Hospital, Seoul, Korea.
authors.forename: Hong Seok
authors.initials: HS
authors.lastname: Park
authors.affiliation: Department of Urology, Korea University Guro Hospital, Seoul, Korea.
authors.forename: Du Geon
authors.initials: du G
authors.lastname: Moon