Adolf Hitler only had one testicle, German historian claims

Reports appear to confirm that Hitler suffered from right-side cryptorchidism

The rhyme about Adolf Hitler having only 'one ball' may in fact be true (Getty Images)

Medical records appear to confirm that Adolf Hitler really did have only one testicle.

German historian Professor Peter Fleischmann claims to have discovered the results of a medical examination on Hitler after his arrest in 1923.

The reports confirm that Hitler suffered from a birth defect known as “right-side cryptorchidism” - an undescended right testicle.

Notes written by Dr Josef Steiner Brin, the medical officer at Landsberg prison, where Hitler was taken after his unsuccessful Beer Hall Putsch, state that the soon to be Führer was otherwise “healthy and strong”.

The records were thought to have been lost but resurfaced at an auction in Bavaria in 2010. They were quickly confiscated by the Bavarian government before being studied at Erlangen-Nuremberg University.

The theory contradicts the belief that Hitler lost his testicle during the Battle of the Somme in the First World War, as well as contradicting his childhood doctor - who told American interrogators in 1943 that the Führer’s genitals were normal.