Carter discovered Tutankhamun's nearly intact tomb in 1922 after an intensive search. When Carter first arrived in Egypt in 1891, most tombs had already been discovered except for Tutankhamun's. After World War I, Carter found steps hidden under debris near King Ramses VI's tomb that led to Tutankhamun's burial room. Recent studies of Tutankhamun's mummy found that he had a cleft palate and mild scoliosis, and likely died from a combination of malaria and a broken leg becoming infected at the age of 18. There is speculation that a hidden doorway in Tutankhamun's tomb chamber may lead to another burial, possibly of Nefertiti.