Skin cancer does not always appear as a growth. Sometimes, it presents as an ulcer. An ulcer is when the topmost layer of skin, the epidermis, is missing. Instead of seeing skin, you see the tissue underneath it. With skin cancer, this occurs when the cancer cells spread downward into the deeper layers of the skin. Ulcers sometimes bleed, but not always. Keep in mind that ulcers can happen for many reasons, including scratching, so seeing one does not mean you have cancer. The only way to tell for sure is to get a biopsy of the ulcer or the skin near it.
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