title: [A case of primary carcinoid tumor of the testis].
abstract: A case of a primary carcinoid tumor of the testis which occurred in a 57-year-old man is reported. The patient was treated by orchiectomy, and no clinical features of a carcinoid syndrome had been noted. The tumor measured 4.0 X 3.2 X 2.0 cm in size and was yellowish in color. Histochemically, the tumor cells were composed in part of argentaffin and in part of argyrophil. Immunohistochemically, the argentaffin tumor cells were positive for neuron-specific-enolase. No tumor cells were positive, however, for neurofilaments, vimentin, keratin, desmin, GFAP, S-100 protein, ACTH, and somatostatin. Electronmicroscopy revealed numerous neurosecretory granules. Tumorous tissue presented a histomorphology of a pure carcinoid tumor composed of parts of argentaffin and argyrophil.
authors.affiliation: Dept. of Pathology, Gunma Cancer Center.
authors.forename: A
authors.initials: A
authors.lastname: Ogawa
authors.forename: S
authors.initials: S
authors.lastname: Sugihara
authors.forename: Y
authors.initials: Y
authors.lastname: Nakazawa
authors.forename: F
authors.initials: F
authors.lastname: Kumasaka
authors.forename: J
authors.initials: J
authors.lastname: Sato
authors.forename: Y
authors.initials: Y
authors.lastname: Nakanishi
authors.forename: Y
authors.initials: Y
authors.lastname: Nakazato
authors.forename: M
authors.initials: M
authors.lastname: Honma
mesh_terms: D002276:Carcinoid Tumor / Q000473:pathology* / Q000601:surgery / Q000648:ultrastructure; D006801:Humans; D008297:Male; D008875:Middle Aged; D009919:Orchiectomy; D013736:Testicular Neoplasms / Q000473:pathology* / Q000601:surgery / Q000648:ultrastructure