Sebaceous carcinoma is an uncommon type of skin cancer. It develops from sebocytes, the cells that make up the oil (sebaceous) glands of the skin. These cells normally produce a fatty substance called sebum, and because the tumor cells continue to make this oily material, the tumor often looks yellow. Sebaceous carcinoma is found most …
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Basal cell carcinoma (BCC) is the most common type of skin cancer. It starts from basal cells, which are found in the deepest layer of the epidermis (the outer layer of the skin) and in hair follicles. Under the microscope, all basal cell carcinomas are made up of clusters of small, darkly stained cells called …
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Lentigo maligna is a type of melanoma in situ, a very early form of skin cancer that has not yet spread beyond the top layer of the skin (the epidermis). It develops in skin that has had years of sun exposure, such as the face, neck, and arms, and it usually affects older adults. Lentigo …
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Invasive melanoma is a type of skin cancer that starts from melanocytes, the cells that produce the pigment melanin. Melanocytes are normally found in the deepest part of the epidermis (the outer layer of the skin). When melanoma first develops, the abnormal melanocytes remain confined to the epidermis — a stage called melanoma in situ. …
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