biomedicalephemera:
Gross Pathology of Melanoma Tumor of the Brain
Melanoma is a cancer of the melanocytes (pigmented cells). While the majority of melanocytes are in the basal layer of the epidermis, giving us our skin pigment, they also exist in the meninges, uvea (in the eyes), inner ear, bones, and colon. As most melanomas are a result of UV radiation damage of melanocytes, the skin is the most common origin of this form of cancer. However, any melanocyte can give rise to it.
While most skin cancers are survivable and detectable, melanomas originating in the skin are the most deadly, causing 75% of all deaths related to skin cancer. Their 5-year survival rate is still over 91% if treated early, however. When not treated in a timely manner, or when originating elsewhere in the body, melanomas frequently spread to the thyroid, brain, and colon.
Reeve Collection at the National Museum of Health. Date unknown.