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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]
Skin cancer is the most commonly diagnosed form of cancer in humans. [11] [12] [13] There are three main types of skin cancers: basal-cell skin cancer (BCC), squamous-cell skin cancer (SCC) and melanoma. [1] The first two, along with a number of less common skin cancers, are known as nonmelanoma skin cancer (NMSC).
The skin weighs an average of four kilograms, covers an area of two square metres, and is made of three distinct layers: the epidermis, dermis, and subcutaneous tissue. [1] The two main types of human skin are: glabrous skin , the hairless skin on the palms and soles (also referred to as the "palmoplantar" surfaces), and hair-bearing skin. [ 3 ]
Itching, bleeding and crust formation may occur in some. [2] The backs and shoulders of males and legs of women are particularly prone. [2] It is a type of melanocytic tumor occurring in intermittently sun-exposed skin. [2] The cause is associated with repeated sunburns in childhood, intermittent exposure to sun during life, and sun bed use. [2]
A light-colored or non-pigmented NM lesion may escape detection because the appearance is not alarming, however an ulcerated and/or bleeding lesion is common. [3]: 696 Polypoid melanoma is a virulent variant of nodular melanoma. [3]: 696 The microscopic hallmarks are: Dome-shaped at low power; Epidermis thin or normal
Tyler “Ninja” Blevins. Theo Wargo/Getty Images for Disney The popular Twitch star Ninja revealed to fans that he’s been diagnosed with skin cancer. “Alright I’m still in a bit of shock ...
Video game streaming star Ninja has been diagnosed with skin cancer. The popular internet personality, 32, whose real name is Tyler Blevins, announced the news March 26 on X, telling fans he was ...
Nevoid melanoma. A nevoid melanoma is a malignant neoplastic lesion of the skin. It is a type of melanoma, the most dangerous form of skin cancer.Nevoid melanomas are clinically significant because they are difficult to distinguish from a benign nevus of the skin, which requires no treatment and is common on most individuals.