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After it was recently revealed that Hitler really did only have one testicle , as per the playground rhyme, but now it appears he may also have had a micro penis.

The Nazi leader is believed to have suffered from a condition known as hypospadias, a congenital defect of the penis, two historians have claimed.

Jonathan Mayo and Emma Craigie say they have uncovered the Fuhrer's medical records which confirm his deformity.

The condition affected 1 in 125 men and sufferers have a malformed opening in the penis, typically on the shaft or base.

Some 1,500 procedures to correct the body organ are performed in the UK each year.

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In their book Hitler's Last Day: Minute by Minute, Mayo and Craigie write: "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."

Hitler's doctor, Theodor Morell, is said to have diagnosed him with hypospadias and had prescribed him with hormones and amphetamines in an attempt to improve his sex drive, the Telegraph reported.

(Image: Getty)

The revelation comes just two months after Hitler's long-lost medical records appeared to confirm the urban legend that he really did only have one testicle.

Britain's schoolchildren have for decades sung a 1939 rhyme mocking the Nazi leader for only having "one ball".

German historian Professor Peter Fleischmann claims to have unearthed evidence that shows it may have more truth to it than first thought.

The medical notes - made in 1923 during a prison check-up- say that the Nazi leader suffered from “right-side cryptorchidism” - an undescended right testicle.

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However Dr Josef Steiner Brin, who examined Hitler, said he was otherwise “healthy and strong”.

The records surfaced at an auction in 2010 but were seized by the Bavarian government and have not been seen since.

Professor Fleischmann, of Erlangen-Nuremberg University, unearthed the notes and carried out the recent study.

He told German newspaper Bild they show one of Hitler's testicles was “probably stunted”.