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melanogenesis Melanogenesis is the production of the pigment melanin, responsible for skin colour. It is triggered by the damaging effect of ultraviolet rays. Ultraviolet rays penetrate the skin and damage DNA; thymidine dinucleotides (pTpT) fragments from damaged DNA will trigger release of the hormone alpha-MSH, which can then bind to melanocytes to cause them produce melanin. Melanin vesicles from the melanocytes are then transferred to surrounding keratinocytes. ...
Ãâó: en.wikipedia.org/wiki/Melanogenesis
melanoma A form of skin cancer that arises in melanocytes, the cells that produce pigment. Melanoma usually begins in a mole.
Ãâó: www.stjude.org/glossary
melanoma A malignant tumor produced by the pigment-producing cells of the skin. It begins as a dark skin lesion and may spread rapidly to other areas on the skin and within the body.
Ãâó: www.amfar.org/cgi-bin/iowa/bridge.html
melanoma a malignant tumour derived from pigment-containing cells especially in skin
Ãâó: www.deh.gov.au/soe/2001/glossary.html
melanomas The most serious and least common form of skin cancer. Melanomas usually grow out of moles (dark raised areas) in the skin cells (called melanocytes) that produce pigment, and can spread to the internal organs. Although people can die from melanoma, it can be easily identified and if caught early, can be treated.
Ãâó: www.ecohealth101.org/glossary.html
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