What is the most common type of skin cancer?

Basal cell carcinoma is the most common type of skin cancer, accounting for approximately 80% of skin cancer cases. This cancer arises from the basal cells, which are located in the outer layer of the skin (the epidermis). The prevalence of basal cell carcinoma can be attributed to several factors, including excessive sun exposure, particularly in individuals with fair skin, and the fact that it typically occurs in sun-exposed areas, such as the face, neck, and ears.

Basal cell carcinoma is generally considered a slow-growing cancer and is less likely to metastasize compared to other types of skin cancer, such as melanoma or squamous cell carcinoma. This characteristic contributes to its high occurrence, as individuals may not seek immediate treatment due to the slower progression of the disease.

In contrast, melanoma, which is more aggressive and has a higher risk of spreading throughout the body, although concerning, is less common overall. Atypical nevi refer to abnormal moles that may have the potential to develop into melanoma but are not considered a type of skin cancer themselves. Squamous cell carcinoma, while also common, is less prevalent than basal cell carcinoma. Therefore, the data clearly support that basal cell carcinoma is the most frequently diagnosed skin cancer.