It's a case of, literally, one hand not knowing what the other is doing. Known as Alien Hand Syndrome (AHS), this rare medical condition causes a person's hand to involuntarily cause havoc, as if it ...

An elderly woman believed she was possessed by ghosts when she saw her arm move on its own before doctors discovered she was actually suffering from an extremely rare condition. A 77-year-old woman ...

Scientists have been left scratching their heads for years over some extremely rare diseases - now being no closer to finding a cure now than they were before. These conditions, which affect fewer ...