All palpable masses within the testicles must be considered to be testicular cancer until proven otherwise. The sensitivity of an ultrasonographic examination is almost 100%, and should be carried out if a solid tumour is suspected or the clinical assessment of a scrotal mass remains uncertain. Obtaining a tissue sample through the scrotum is contraindicated if cancer is suspected. The prognosis of testicular cancer is good. Self examination of the testicles is important especially in those belonging to the risk group. Patients in the risk group are those whose father or brother has been diagnosed with testicular cancer and those who have been treated for undescended testes.