title: Case of seminoma with possible spontaneous regression without extragonadal metastatic lesion.
abstract: We present an extraordinarily rare finding of a testicular seminoma apparently in the process of spontaneous regression without accompanying metastatic lesion. A 35-year-old man visited our institute for persistent scrotal induration after the administration of antibiotics for several weeks. Ultrasonography and magnetic resonance imaging showed a capsulized tumor in his left atrophic testicle, without other visceral tumor or lymphadenopathy. We performed left radical orchiectomy. Histological examination revealed a fibrotic tumor with a small area of pure seminoma apparently undergoing spontaneous regression, and an intratubular germ cell neoplasia, unclassified, occurring diffusely. The patient is free of disease at 1 year after surgery.
authors.affiliation: Department of Urology, Kitasato Institute Hospital, Tokyo, Japan.
authors.forename: Satoru
authors.initials: S
authors.lastname: Minamida
authors.forename: Akira
authors.initials: A
authors.lastname: Irie
authors.forename: Junichiro
authors.initials: J
authors.lastname: Ishii
authors.forename: Sadatsugu
authors.initials: S
authors.lastname: Minei
authors.forename: Masaki
authors.initials: M
authors.lastname: Kimura
authors.forename: Masatsugu
authors.initials: M
authors.lastname: Iwamura
authors.forename: Shojiroh
authors.initials: S
authors.lastname: Morinaga
mesh_terms: D000328:Adult; D006801:Humans; D008297:Male; D009365:Neoplasm Regression, Spontaneous; D018239:Seminoma / Q000473:pathology* / Q000601:surgery; D013736:Testicular Neoplasms / Q000473:pathology* / Q000601:surgery