What type of skin cancer is characterized by uncontrolled growth of melanocytes?

Melanoma is a type of skin cancer that arises from the uncontrolled growth of melanocytes, the cells responsible for producing melanin, which gives skin its color. This form of cancer is particularly dangerous because it can spread rapidly to other parts of the body if not detected early. Melanocytes are primarily located in the epidermis, and when these cells undergo malignant transformation, they can form tumors that are often dark in appearance. Additionally, melanoma may develop from existing moles or can appear as new pigmented lesions on the skin.

In contrast, basal cell carcinoma originates from basal cells in the epidermis, and squamous cell carcinoma arises from squamous cells, which are also found in the outer layer of the skin. These types of cancer generally do not arise from melanocytes and present with different characteristics and growth patterns. Adenocarcinoma is a type of cancer that originates in glandular tissue, further distinguishing it from melanoma and the other types of skin cancer.