Family Nurse Practitioner Exam

What is the most common type of skin cancer?

1. Basal cell skin cancer

2. Squamous cell skin cancer

3. Melanoma

4. Actinic keratosis

The correct answer is: Basal cell skin cancer

Basal cell skin cancer is indeed the most common type of skin cancer. This type occurs in the basal cells, which are located in the outer layer of the skin (epidermis). The primary cause of basal cell carcinoma is often prolonged exposure to ultraviolet (UV) radiation from the sun, which leads to cellular damage over time. While other types of skin cancers such as squamous cell carcinoma and melanoma exist, they occur less frequently than basal cell carcinoma. Squamous cell carcinoma arises from squamous cells and can also be linked to UV exposure but typically represents a smaller proportion of skin cancer cases. Melanoma, on the other hand, is less common but is known for being more aggressive and having a higher potential for metastasis. Actinic keratosis is not a type of skin cancer but rather a precancerous condition that can lead to squamous cell carcinoma if left untreated. Therefore, understanding the prevalence and risk factors associated with basal cell skin cancer highlights why it stands out as the most common form, making it essential knowledge for healthcare professionals, particularly in dermatology and primary care.