Basal cell carcinoma is the most common type of skin cancer, accounting for approximately 80% of all cases.

Exposure to ultraviolet (UV) radiation from the sun or artificial sources like tanning beds is the primary cause of skin cancer.

Melanoma is often characterized by an asymmetrical shape, irregular borders, color variation, and a diameter larger than 6 millimeters.

A combination of regular sunscreen use, avoiding peak sun hours, wearing protective clothing, and performing regular skin self-exams is the most effective way to prevent skin cancer.

Melanoma is the most aggressive type of skin cancer and has the potential to spread to other parts of the body through metastasis.

Regular skin self-exams are recommended once a month to detect any suspicious changes or new lesions.

Vitamin D deficiency is not a risk factor for skin cancer.

Surgery is the primary treatment for basal cell carcinoma, as it involves removing the cancerous tissue.

Merkel cell carcinoma is often associated with immunosuppression, such as in individuals with HIV/AIDS or organ transplant recipients.

Sunscreens with an SPF of 30 or higher are recommended for effective protection against UV radiation.

Melanoma is a type of melanoma skin cancer, while actinic keratosis is a precancerous condition that can develop into squamous cell carcinoma.

Surgery is the primary treatment for squamous cell carcinoma, as it involves removing the cancerous tissue.

Actinic keratosis is often characterized by rough, scaly patches on the skin that may be pink, red, or brown in color.

Sunscreen should be reapplied every 2 hours, or more frequently if swimming or sweating heavily.

Kaposi's sarcoma is a type of cancer that affects the blood vessels and is not a type of skin cancer.