What type of skin cancer is considered more aggressive and can spread rapidly?

Melanoma is known for being the most aggressive type of skin cancer among the options listed. This form of cancer arises from melanocytes, the pigment-producing cells in the skin, and is particularly dangerous due to its ability to metastasize, or spread, quickly to other parts of the body. Early detection and treatment are crucial because once melanoma has spread beyond the skin, it can become significantly more challenging to treat and can lead to severe health complications.

Basal cell carcinoma, while common and requiring treatment, typically grows slowly and rarely spreads to distant areas of the body. Squamous cell carcinoma can be more aggressive than basal cell carcinoma, but it generally has a lower rate of metastasis compared to melanoma. Kaposi's sarcoma, although it can be aggressive and is typically associated with immunocompromised individuals, is a different type of cancer that arises from blood vessels and is not classified as a form of skin cancer like melanoma, basal cell carcinoma, or squamous cell carcinoma. Hence, melanoma stands out as the skin cancer with the highest potential for rapid spread.