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Melanoma symptoms and signs. Melanoma tumors tend to be black or brown, but can sometimes be pink, tan or white. Anyone can get melanoma, but people with light skin are at greater risk. Causes of ...
A distinct variant of intradermal nevus, usually in a child. They are raised and reddish (non-pigmented). Characteristic vertically arranged nests of cells ("hanging bananas"). H&E stain. Giant pigmented nevus: Large, pigmented, often hairy congenital nevi. They are important because melanoma may occasionally (10 to 15%) appear in them ...
However, a melanocytic nevus is benign, and melanoma is malignant. Most melanocytic nevi never evolve into a cancer, with the lifetime risk for an individual nevus being 1 in 3000 for men and 1 in 11 000 for women. [5] Moreover, dermatologists have a standardized system for determining whether a skin lesion is suspicious for malignant melanoma.
Melanoma is the most dangerous type of skin cancer; it develops from the melanin-producing cells known as melanocytes. [1] It typically occurs in the skin, but may rarely occur in the mouth, intestines, or eye (uveal melanoma). [1] [2] In women, melanomas most commonly occur on the legs; while in men, on the back. [2]
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In comparison, the mortality rate of melanoma is 15–20% and it causes 6500 deaths per year. [67]: 29, 31 Even though it is much less common, malignant melanoma is responsible for 75% of all skin cancer-related deaths. [68] The survival rate for people with melanoma depends upon when they start treatment.
Congenital nevus. Note the variable coloration and slightly irregular border. The congenital melanocytic nevus appears as a circumscribed, light brown to black patch or plaque, potentially very heterogeneous in consistency, covering any size surface area and any part of the body.
Melanoma is a malignant proliferation of melanocytes and the most aggressive type of skin cancer. [80] [81] [82] Acral lentiginous melanoma Nodular melanoma; Amelanotic melanoma; Animal-type melanoma; Desmoplastic melanoma (neurotropic melanoma, spindled melanoma) Lentigo maligna (lentiginous melanoma on sun-damaged skin) Lentigo maligna melanoma