title: [A case of polyarteritis nodosa presenting as a mass in scrotum].
abstract: A 16-year-old boy with a painful tumor in the left scrotum was referred to our department. CT scans showed a low density area in the left testis, so we diagnosed a left testicular tumor and performed left inguinal orchiectomy. Histological examination revealed polyarteritis nodosa (PN) of the testis and epididymis. Systemic examination revealed no other evidence of PN. Although induration developed in the right epididymis after the operation, it resolved with steroid therapy. The patient is currently asymptomatic and is being followed at our clinic. The pathogenesis and management of this rare condition are discussed.
authors.affiliation: Department of Urology, Tane General Hospital.
authors.forename: T
authors.initials: T
authors.lastname: Kishino
authors.forename: K
authors.initials: K
authors.lastname: Fujimoto
authors.forename: Y
authors.initials: Y
authors.lastname: Hayashi
authors.forename: H
authors.initials: H
authors.lastname: Momose
authors.forename: T
authors.initials: T
authors.lastname: Otani
authors.forename: S
authors.initials: S
authors.lastname: Ozono
authors.forename: Y
authors.initials: Y
authors.lastname: Hirao
authors.forename: H
authors.initials: H
authors.lastname: Shiiki
authors.forename: K
authors.initials: K
authors.lastname: Dohi
authors.forename: H
authors.initials: H
authors.lastname: Maruyama
mesh_terms: D000293:Adolescent; D000893:Anti-Inflammatory Agents / Q000627:therapeutic use; D005834:Genital Neoplasms, Male / Q000150:complications* / Q000601:surgery; D006801:Humans; D008297:Male; D009919:Orchiectomy; D010488:Polyarteritis Nodosa / Q000150:complications* / Q000188:drug therapy / Q000601:surgery; D011239:Prednisolone / Q000627:therapeutic use; D012611:Scrotum; D013736:Testicular Neoplasms / Q000150:complications* / Q000601:surgery
chemical_list: D000893:Anti-Inflammatory Agents; D011239:Prednisolone