WALKING CORPSE SYNDROME
Deluded patients think they have lost body parts or their souls, and often believe they have died. Also called Cotard's syndrome, the mental disease has been found in people with schizophrenia and bipolar disorder.
BLUE SKIN DISORDER
A large family simply known as the "blue people" lived in the hills around Troublesome Creek in Kentucky until the 1960s. They were the blue Fugates. Most of them lived past the age of 80, with no serious illness - just blue skin. The trait was passed on from generation to generation. People with this condition have blue, plum, indigo or almost purple skin.
A patient's sense of time, space and body image are distorted. People may appear tiny or patients may feel that part of their body shape or size has been altered.
JUMPING FRENCHMAN DISORDER
The main characteristic is that patients are extremely startled by an unexpected noise or sight. It's not just twitching when someone sneaks up behind you. Patients with this disorder flail their arms, cry out and repeat words. First identified in some of Maine's lumberjacks of French-Canadian origin, the odd reflex has been identified in other parts of the world, too.