Squamous cell carcinoma of the skin: a red, very firm, painless lump on actinic damaged skin that has existed for at least 2 years, initially slowly increasing, but in the last 2 months growing significantly faster, 2.5 x 1.5 cm in size; central, firmly adhering horn plug that can be moved against the base.
Squamous cell carcinoma of the skin: sharply defined, on the base well movable, centrally crusty (crusts are adherent), painless plaque (only at the lateral and lower edge the original epithelial structures are visible).
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