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Check these out! They're all real:

1) Alien Hand Syndrome. Also sometimes referred to as the Dr. Strangelove Syndrome, this condition causes a patient's hand to take on a life of its own and act on its own accord.
2) Riley-Day Syndrome. Patients with this condition are often unable to feel any pain, which can prove dangerous should they ever get injured.
3) Cotard's Syndrome. An individual's belief that he or she is dead despite those around them saying they are not. Some report also believing they do not exist at all.
4) Apotemnophilia. The desire of an individual to amputate a perfectly-healthy limb.
5) Alice in Wonderland Syndrome. Patients with this condition report experiencing distorted body proportion: certain body parts -- often the head and hands -- are larger than they should be.
6) Prosopagnosia. Sometimes called "face-blindness," this condition renders individuals unable to recognize faces -- even those of the people they love or encounter on a regular basis.
7) Capgras Delusion. The belief that an acquaintance, or even someone an individual knows very well, is actually an identical-looking imposter.