Another genetic disease, craniosynostosis, which can result in the joints in the skull fusing too early, could have caused the pharaoh's elongated head and neck. Egyptologists sometimes refer to the shape, which was common among 18th-dynasty royalty, as "royal head." Illustrations of Akhenaton's daughters also show the elongated head, as do mummies of his progeny. One such descendant: child-king Tutankhamen, who some believe may have been Akhenaton's son. Akhenaton's mummy has yet to be found, but Braverman hopes that DNA analysis of mummies of the pharaoh's descendants may one day confirm his theory.