4. Cow Hide Girl
Medics were baffled by a six-year old girl who was diagnosed with one of the rarest Birthmarks on her skin, leaving her to look like- a cow hide girl. Li Xiaoyuan, was until recently with a small birthmark on her body, but the hide has kept growing and now it is threatening to cover most her body parts.
According to Dr. Lou Zhongquan, a surgeon at Zhaoqing City Dermatological Hospital, the girl could be a victim of a hereditary rare disease and has sent normal moles out of control. (Source)