Which type of skin cancer is most commonly linked to prolonged sun exposure?

Prolonged sun exposure is a significant risk factor for certain types of skin cancer, particularly basal cell carcinoma and squamous cell carcinoma. These two types are often collectively categorized as non-melanoma skin cancers, and they arise from the skin's outer layer, or epidermis, where keratinocytes and basal cells are located.

Basal cell carcinoma originates from the basal cells in the epidermis and is typically linked to chronic sun exposure and the cumulative effects of ultraviolet (UV) radiation. It is the most common form of skin cancer, often presenting as a pearly or waxy bump, primarily in sun-exposed areas.

Squamous cell carcinoma arises from the squamous cells, which are found just above the basal cells in the epidermis. Like basal cell carcinoma, it is also associated with prolonged UV exposure. It can appear as a firm red nodule, scaly patch, or a sore that doesn’t heal, and while it is generally less common than basal cell carcinoma, it can be more aggressive in some cases.

Melanoma, the other type of skin cancer mentioned, is primarily linked to intense, intermittent sun exposure rather than prolonged exposure. It develops from melanocytes, the cells that produce pigment, and tends to be