LEYDIG CELL TUMOUR OF THE RIGHT TESTICLE IN AN ELEVEN YEAR OLD LABRADOR DOG

Abstract

Testicular tumours are the second most common tumour in male dogs. Primary testicular tumours account for about 90 per cent of all tumours affecting the male genitalia (Hayes and Pendergrass, 1976). According to the World Health Organization (WHO) classification of tumours of domestic animals, the major types of testicular tumour in dogs are sex cord stromal tumours, germ cell tumours and mixed germ cell sex-cord stromal tumours (Kennedy et al., 1998). The common types of sex cord stromal tumours are Sertoli cell tumour and Leydig cell tumour (Interstitial cell tumour, ICT) and that of germ cell tumour is seminomas.