Lithopedian: One of the worst but most morbidly interesting things to find on the internet, It's when a fetus dies due to abdominal stages in which have failed, in which would cause the fetus to slowly turn into a black hard stonelike ball for years. Lithopedians are very rare, only about over 300 cases of lithopedians have been documented worldwide, and compare this to FOP (Stone man syndrome) in which as over 4000 cases worldwide, this makes lithopedians very rare indeed.