Is King Tutankamun's penis missing? It seems that Jo Marchant, who was researching the possibility that Tut suffered from Antley-Bixler syndrome (which lends physical effects like elongated skulls and "even under-developed genitalia"), discovered that, lo and behold, Tut's genitalia was not there at all. But it was there in 1922, and even in 2006, although it had become detached in that period of time.
Source: The Village Voice
Tutankhamun and the Golden Age of the Pharaohs: Official Companion Book to the Exhibition sponsored by National Geographic
Composite Bowls from the Tomb of Tut'ankhamun [Tut'ankamun's Tomb Series, III)
The Complete Tutankamun: the King, the Tomb, the Royal Treasure.
Pharaohs Flowers the Botanical Treasures of Tutankamun