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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 common form of cancer, globally accounting for at least 40% of cancer cases. [5] [20] The most common type is nonmelanoma skin cancer, which occurs in at least 2–3 million people per year. [6] [21] This is a rough estimate; good statistics are not kept. [1]
Melanoma is a malignant proliferation of melanocytes and the most aggressive type of skin cancer. Subcategories. This category has only the following subcategory. D.
Acral lentiginous melanoma (ALM) is a type of skin cancer. [6] It typically begins as a uniform brownish mark before becoming darker and wider with a blurred, irregular border. ALM is most frequently seen on the foot of a person with darker skin but can also be found in non-sun exposed areas such as the palms , soles , and under finger and ...
Uveal melanoma is a type of eye cancer in the uvea of the eye. [3] It is traditionally classed as originating in the iris , choroid , and ciliary body , but can also be divided into class I (low metastatic risk) and class II (high metastatic risk). [ 3 ]
Evolution of a 4 mm nodular melanoma. Nodular melanoma (NM) is the most aggressive form of melanoma. [1] It tends to grow more rapidly in thickness (vertically penetrate the skin) than in diameter compared to other melanoma subtypes. [2] Instead of arising from a pre-existing mole, it may appear in a spot where a lesion did not previously exist.
Although a nevus and a melanoma are often treated as independent entities, there is evidence that a nevus can be a precursor for a melanoma. [1] Common mutations have been identified in nevi and melanomas. [2] [3] [4]
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.