Melanocytic Nevus Difference Between A Birthmark Mole And Nevus Stock Illustration Download Image Now iStock SKCIN Melanoma begins in melanocytes the cells that produce the pigment melanin that colours the skin, hair and eyes and tans the skin when it is exposed to UV radiation GASTROINTESTINAL HEMORRHAGE (2): Melena. Melena, the passage of black, tarry stools, usually implies blood loss greater than 500 ml originating anywhere between the oropharynx and the right hemicolon. Melena occurs most often, What is the Difference Between Melanocytes and Melanosomes Pediaa.Com Melanotic refers to MELANIN not MELENA #medicine #doctor #humor #doctorsofinstagram #medreels #melanin