AKT1 and germ cell tumor: AKT1 mutations have recently been identified exclusively in cisplatin‐resistant germ cell tumours 62, and copy number gain and concomitant overexpression of AKT1 were a frequent event in a study of intracranial germ cell tumours, which although clinically and histologically similar to gonadal germ cell tumours, are more likely to be refractory to treatment 63.