Fertility preservation in testicular cancer - predictors of spermatogenesis.

Spermatogenesis is present in most testes affected by TGCTs; it is widespread in two-thirds of patients, and located away from the tumour in 94%. These findings can help predict and guide successful surgical sperm retrieval in testes with TGCTs. The finding of focal spermatogenesis in a third of patients would support a microsurgical approach to sperm retrieval at the time of orchidectomy to maximise success.