Sertoli cell nodule: A Sertoli cell nodule, also Pick's adenoma, testicular tubular adenoma and tubular adenoma of the testis, is a benign proliferation of Sertoli cells that arises in association with cryptorchidism (undescended testis). They are not composed of a clonal cell population, i.Bob ChampionSpermatocytic seminomaOld German Shepherd Dog: Old German Shepherd Dog () is a controversial predicate for the long-hair variation of the German Shepherd Dog (), which is not a separate breed recognized by the Fédération Cynologique Internationale. Nonetheless, there are efforts to establish this variety as a separate breed.Frasier syndrome: Frasier syndrome is a urogenital anomaly associated with the WT1 (Wilms tumor 1 gene) gene.Blood–testis barrier: The blood–testis barrier is a physical barrier between the blood vessels and the seminiferous tubules of the animal testes. The name "blood-testis barrier" is misleading in that it is not a blood-organ barrier in a strict sense, but is formed between Sertoli cells of the seminiferous tubule and as such isolates the further developed stages of germ cells from the blood.Large cell: Large cell is a term used in oncology. It does not refer to a particular type of cell; rather it refers to cells that are larger than would be normally expected for that type.Kennel clubSeminiferous tubule: Seminiferous tubules are located within the testes, and are the specific location of meiosis, and the subsequent creation of male gametes, namely spermatozoa.Giant-cell tumor of the tendon sheathGerm cell tumorGranular cell tumor