Final answer:
An acraly lesion in sun-exposed areas is likely actinic keratosis, an early-stage squamous cell carcinoma (SCC) that forms on skin exposed to UV radiation. SCC can present as a scaly, crusty lesion or a firm red nodule and is curable if caught early through surgery or radiation.
Step-by-step explanation:
An acraly lesion in sun-exposed areas, which is a precursor to squamous cell carcinoma (SCC), is likely referring to an actinic keratosis (AK) or a type of early-stage SCC. These lesions typically form on skin that has been exposed to ultraviolet (UV) radiation from the sun, and they can progress to SCC if left untreated. SCC is a type of cancer that affects keratinocytes in the stratum spinosum layer of the epidermis. It is commonly found on the scalp, ears, and hands, areas that receive a lot of sun exposure. The lesion may present as a flat and scaly surface or as a firm red nodule. SCC is the second most common form of skin cancer and can be more aggressive than basal cell carcinoma. If detected early, it can typically be cured with surgical methods or radiation.