Adolf Hitler
Adolf Hitler (1889 - 1945) in Munich in the spring of 1932.Getty Images

According to historians Jonathan Mayo and Emma Craigie, Nazi dictator Adolf Hitler suffered from the hypospadias condition that left him with a micropenis. The historians make the revelation in their book Hitler's Last Day: Minute by Minute.

"Hitler himself is believed to have had two forms of genital abnormality: an undescended testicle and a rare condition called penile hypospadias in which the urethra opens on the under side of the penis," wrote Mayo and Craigie.

Mayo and Craigie reportedly found medical records that confirmed Hitler's condition, which was so severe that he had to urinate from a hole at the base of the shaft. Earlier medical documents uncovered revealed that Hitler had an undescended testicle on the right side, as claimed by Professor Peter Fleischmann of Erlangen-Nuremberg University.

The medical records were from 1923, when Hitler was examined by a Landsberg prison doctor following his arrest after he failed to seize power in Munich Beer Hall Putsch. The prison's medical officer, Dr. Josef Steiner Brin, had noted, reported The Telegraph: "Adolf Hitler, artist, recently writer... healthy and strong ... [suffering from] right-side cryptorchidism." Hitler's personal doctor, Theodor Morell, reportedly also diagnosed him with hypospadias and prescribed several hormones and amphetamines to allow the Nazi dictator to improve his sex drive.

The news confirms the lyrics to a popular anti-Nazi song that mocks Hitler and Nazi leaders and has been sung by generations of British schoolchildren. The lyrics of the song written by publicist for the British Council in 1939 read: "Hitler has only got one ball, the other is in the Albert Hall. Hitler has only got one ball. Göring has two but they are small. Himmler has something similar. And Goebbels has no balls at all."