In 1955 the Russians released several German prisoners who had been present during Hitler's last days, one of whom told of burying Hitler's remains in a bomb crater. Trevor-Roper interviewed the men, and on the basis of their comments deduced that the Russians had exhumed the bodies and examined them in May, 1945. This was confirmed to his satisfaction in the 1960s, when Russian journalists published accounts of the search for Hitler.
One such book published in 1968 was particularly interesting, and it's here we get back to the question of Hitler's missing organs. The book included the report of the autopsy performed on Hitler's bod by Russian pathologists. This contained the startling news that Hitler's "left testicle could not be found either in the scrotum or on the spermatic cord inside the inguinal canal, or in the small pelvis. . . ."
This revelation struck many as suspicious. None of Hitler's doctors or attendants had ever mentioned anything about a missing testicle, and his medical records were silent on the subject. A woman who claimed to have been his lover said he was normally equipped. Moreover, the autopsy report said Hitler's body showed no external wounds, even though all the German witnesses mentioned a shot through the head.
Hitler's World War I company commander, however, offered some support for the Russian finding. He said he'd discovered Hitler's missing testicle as a result of a wartime VD exam.
Questions about the authenticity of the Russian autopsy records were more or less resolved in 1972. Dr. Reidar Sognnaes, a dental expert at the University of California at Los Angeles, compared the Russky data with previous X-rays of Hitler's skull and pronounced the former genuine. (Sognnaes used similar methods to confirm that a body dug up in Berlin was that of Hitler's secretary, Martin Bormann.) So I guess we have to conclude that in some departments, at least, Hitler really wasn't all there.