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Melanoma in situ is an early form of primary melanoma in which the malignant cells are confined to the tissue of origin, the epidermis. It is also known as in-situ melanoma and level 1 melanoma.
Melanoma in situ is the earliest stage of melanoma (stage 0) and is localized to the outermost layer of skin (epidermis). It is regarded as a potential precursor lesion to invasive melanoma (stages I to IV), in which melanoma invades the deeper layers of the skin and, in doing so, acquires the potential ability to spread to distant sites, which ...
Melanoma in situ is a type of melanoma skin cancer that is only in the top layer of skin and has not spread deeper. Learn about the TNM staging system, surgery, imiquimod cream and surveillance for this stage 0 melanoma.
Melanoma in situ is the earliest stage of a skin cancer called melanoma, when the cancer cells are confined to the top layer of the skin. Learn about the causes, symptoms, diagnosis and treatment of this condition, and how to prevent it with sun protection and regular checks.
Learn how melanoma is staged based on the thickness of the primary tumor, ulceration, and whether it has spread. Stage 0 melanoma is the earliest and most curable stage, while stage 4 melanoma is the most advanced and hardest to treat.
What is Stage 0 (in situ) Melanoma? In Stage 0 melanoma, the malignant tumor is still confined to the upper layer of the skin—the epidermis—which means the cancer cells are only in the outer layer of the skin and have not grown into the second layer of skin, called the dermis.
Stage 0 melanoma (melanoma in situ) has not grown deeper than the top layer of the skin (the epidermis). It is usually treated by surgery (wide excision) to remove the melanoma and a small margin of normal skin around it. The removed sample is then sent to a lab to be looked at with a microscope.
