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Causes of melanoma. Ultraviolet light exposure from the sun or from tanning beds causes most melanomas. Melanoma may appear at a spot where you have an existing mole. But if an unusual spot shows ...
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]
Treatments depend on how advanced the melanoma is and where the tumor is located. It may include surgery, radiation, chemotherapy or other therapies. Read more about melanoma and how to treat it.
Among men, 683 754 cases were diagnosed, accounting for 7.2% of all cancer cases, and among women, stomach cancer was diagnosed in 349 947 cases, accounting for 4.1% of all cancer cases. [96] In 2012, stomach cancer was the fifth most-common cancer with 952,000 cases diagnosed. [16] It is more common both in men and in developing countries.
Melanoma has one of the higher survival rates among cancers, with over 86% of people in the UK and more than 90% in the United States surviving more than 5 years. [18] [19] Skin cancer is the most common form of cancer, globally accounting for at least 40% of cancer cases.
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Treatment is generally the same as for non-pregnant women. However, radiation and radioactive drugs are normally avoided during pregnancy, especially if the fetal dose might exceed 100 cGy. In some cases, some or all treatments are postponed until after birth if the cancer is diagnosed late in the pregnancy.
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.