Tumores testiculares caninosa propósito de dos casos clínicos

Résumé

Testicular tumours are most frequent in dogs than in other species. These are a habitual pathology in veterinary medicine and testicular tumours are found during the physical exploration. Most testicular tumours in dogs are benign, which is in contrast to humans, where such tumours are highly malignant. Clinical signs associated with testicular tumours in dogs vary with tumour type but are often caused by excessive hormone production by the tumour. Sertoli cell tumour and seminoma may produce estrogens, whereas interstitial cell tumours are known to produce testosterone. Some dogs with Sertoli cell tumour may present feminization syndrome. It is also reported to occur in dogs with seminoma. Interstitial cell tumours may produce prostatic disease and perianal gland neoplasm. Most testicular tumours are asymptomatic and are diagnosed as incidental findings in older dogs. Testicular ultrasonography may not provide a definitve diagnosis but can help outline other conditions in the testes, epididymis and scrotum. In some clinical cases, preputial cytology can be used as a tool in order to differentiate the canine testicular tumour type. For the vast majority of dogs with testicular tumours, orchiectomy is curative. The metastatic rate is low, and sites of metastases include regional lymph nodes, kidney, liver and spleen, lungs, adrenal glands and pancreas. Chemotherapy for metastasic canine testicular tumours has not been well explored.