A persistent red sore, nodule, or scaly patch could be squamous cell carcinoma. The growths have a crusty exterior and often appear on areas that experience frequent sun exposure. Squamous cell carcinoma can develop on any area of the body, including the genitals, though the most likely places are a balding scalp, or the neck, hands, arms, or face. They may also appear on the rim of the ear or the lower lip. Over the last three decades, the number of squamous cell carcinoma diagnoses has increased by more than 200%.
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