UK teen becomes first British patient to receive frozen testicular tissue transplant

A 19-year-old UK student, treated at 16 with a bone-marrow transplant and intensive chemotherapy for a life-threatening blood disorder, became the first British individual to have part of his testicles frozen and later re-implanted. After his treatment left him without sperm, researchers at Edinburgh University extracted spermatogonial stem cells from his testicular tissue in 2023 and stored them. In August they carried out the world’s second human transplant of these cells, hoping to restore sperm production.

The operation follows a decade of research and mirrors a similar case performed in Belgium earlier this year. The patient says the procedure gives him renewed hope, while clinicians will assess sperm development after eight months of monitoring. Success could open a new fertility-preservation pathway for boys who cannot yet produce semen before cancer therapy.