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BACKGROUND: Melanin is a skin pigment that determines skin colour and plays a role in photoprotection. It represents one of the most visible markers of human variation and skin disorders. Lack of Melanin or presence of very little melanin or albinism makes the skin susceptible to a wide range of...

The cerebellar tonsils are part of the nervous system which is the chief controlling and coordinating system of the body. Their functional role is not yet known but are believed to coordinate skilled and learned movements. The cerebellar tonsils are prone to herniation through the foramen magnum...