Testicular Neoplasia
- TESTICULAR NEOPLASIA
Common in dog, may be multiple, bilateral with more than one tumour type within a testis. There is increased incidence of tumours (especially Sertoli cell tumours) in cryptorchid testes; these may be very large when identified. It is important to section spermatic cord to check for metastatic spread.
Germinal cells:
- Teratoma:young stallion.
- Seminoma:old dogs and stallions.
Sex cord-stroma:
- Sertoli cell tumours:old dogs (more common than seminoma).
- Leydig (Interstitial) cell tumours:old dogs commonly and bulls.
Classification of testicular tumours
insert table here
Feminisation syndrome associated with Sertoli cell tumours
Thus is due to oestrogen production and is seen as:
Skin:ventral alopecia and hyperpigmentation.
Mammary gland:cystic hyperplasia.
Genital organs:preputial oedema, squamous metaplasia of prostate (decreased size), contralateral testicular atrophy.
Information by kind permission of Professor R W Else