author(s)
Hamid Shah, Burhan Nabi, Vikram Malhotra and Sheikh Shoib

abstract
Testicular neoplasia is rare in equines and more commonly seen in canine and feline group, testicular neoplasia arises from germ cells and sex-cord stromal elements of the testis. One such condition was seen in a six-year-old Marwari breeding stallion presented with a progressive scrotal swelling over 2-3 months. On palpation the testicle was hard and slightly tender. For confirmation of other conditions ultrasound examination was done to rule out inguinal hernia, hydrocele, abscess and haematoma around inguinal region. Unilateral orchidectomy was done on owners request to preserve the breeding status of stallion. Xylazine and butorphanol was administered as premedication for sedation followed by diazepam and ketamine and triple drip; 5% Guaifenesin + Xylazine (0.5 mg per ml + ketamine 1 mg per ml) used for induction and general anaesthesia, respectively. Grossly the testicle was multinodular with a grey-white surface and microscopic observation revealed the testicular tissue had diffuse proliferation of very large, polyhedral cells having sharp borders, vesicular nuclei and prominent nucleoli.