Which type of skin cancer originates from the epithelial cells?

Basal cell carcinoma is a type of skin cancer that originates specifically from the epithelial cells, particularly the basal cells found in the lower part of the epidermis. These basal cells are responsible for producing new skin cells. This form of cancer is the most common skin cancer and is known for its slow growth and low likelihood of metastasizing, but it can cause significant local tissue damage if not treated.

Melanoma, while a serious form of skin cancer, arises from melanocytes, which are the cells that produce pigment in the skin. Neoplastic skin diseases refer to a broader category of skin tumors, some of which may not be directly classified as skin cancer. A melanocytic nevus, commonly known as a mole, is a benign growth of melanocytes and does not represent a form of skin cancer. Understanding the origins of these various skin conditions is crucial in differentiating types of skin cancer and their respective treatment approaches.