27 Rare and Mysterious Medical Conditions

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26. Xeroderma pigmentosum (Vampire Syndrome)

Xeroderma pigmentosum, often just called XP, is an inherited condition characterized by an extreme sensitivity to sunlight. The body usually repairs damage to the skin caused by the sun’s harmful ultraviolet light. However, people with XP lack this ability, leaving them at greatly increased risk of developing skin cancer. Vampire Syndrome is rare because it copies the abnormal gene that causes the condition and must be inherited from both parents.

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