Which type of skin cancer is most commonly associated with prolonged sun exposure?

• A. Melanoma
• B. Basal cell carcinoma
• C. Squamous cell carcinoma
• D. Merkel cell carcinoma

Answer: (B)

Basal cell carcinoma is the type of skin cancer most commonly linked with prolonged sun exposure. This form of cancer originates from the basal cells, which are found in the outer layer of the skin. The primary risk factor for developing basal cell carcinoma is ultraviolet (UV) radiation from the sun, which can lead to changes in the DNA of skin cells.

Individuals who have frequent, unprotected sun exposure, especially those who experience sunburns, are at a heightened risk for developing this type of cancer. Basal cell carcinoma tends to grow slowly and is typically found on sun-exposed areas of the skin such as the face, ears, neck, and scalp.

While melanoma is the most aggressive form of skin cancer and poses a higher risk of spreading to other parts of the body, it is less commonly associated with chronic sun exposure compared to basal cell carcinoma. Squamous cell carcinoma also has ties to sun exposure but is less prevalent than basal cell carcinoma. Merkel cell carcinoma, on the other hand, is quite rare and not primarily linked to sunlight but rather to other factors, including the immune system's status.

Thus, recognizing that basal cell carcinoma is most prevalent among skin cancers related to sun exposure emphasizes the importance of sun safety practices, such as