What is the most common type of skin cancer?

Basal cell carcinoma is the most common type of skin cancer, accounting for the vast majority of skin cancer cases. This type of cancer originates from the basal cells, which are located in the lower part of the epidermis. Basal cell carcinoma typically results from prolonged exposure to ultraviolet (UV) radiation from the sun or tanning beds, making it a significant concern for those who spend a lot of time outdoors without proper skin protection.

Basal cell carcinoma usually manifests as a small, shiny bump or a sore that doesn't heal. Unlike melanoma, which is more aggressive and likely to metastasize, basal cell carcinoma generally grows slowly and rarely spreads to other parts of the body. This slower progression contributes to its higher occurrence among skin cancers.

In contrast, melanoma, while it is a serious and potentially deadly form of skin cancer, is less common than basal cell carcinoma. Squamous cell carcinoma is another form of skin cancer, also linked to UV exposure, but it occurs less frequently compared to basal cell carcinoma. Adenocarcinoma is a type of cancer that originates in glandular tissues and is not typically classified as a skin cancer, making it irrelevant in the context of skin tumors. This clearly establishes basal cell carcinoma as the predominant type of skin cancer.