title: [Histological changes in the rat testis and epididymis caused by total and partial pinealectomy].
abstract: Histological changes of testis and epididymis after partial and total pinealectomy in albino rat have been studied. After 8 and 16 days from total pinealectomy, testicular parenchyma showed morphological aspects of hypotrophy characterized by the absence of spermatozoa in tubular lumen and by tubules lined by an immature seminiferous epithelium. At the 21st day we have noticed a restoration of normal spermatogenesis. Leydig and Sertoli cells did not state significative modifications. After 8 and 16 days from the operation epididymal canalicula presented a narrowed lumen, lined by a pseudostratified columnar epithelium and occupied by numerous immature spermatogenic cells. After partial epiphysectomy we did not notice any significative modification both in the testicular and epididymal parenchyma. A participation of epiphysis cerebri in temporal regulation of spermatogenesis in albino rat male gonads has been hypothesized.
mesh_terms: D000818:Animals; D004822:Epididymis / Q000473:pathology*; D008297:Male; D010870:Pineal Gland / Q000601:surgery*; D011183:Postoperative Complications; D051381:Rats; D013091:Spermatogenesis; D013733:Testicular Diseases / Q000209:etiology; D013737:Testis / Q000473:pathology*
vernacular_title: Modificazioni istologiche del testicolo e dell'epididimo di ratto da epifisectomia totale e parziale.