Final answer:
Malignant melanoma is the most dangerous type of skin cancer, characterized by the uncontrolled growth of pigment-producing cells in the epidermis. It is highly metastatic and treatment usually involves surgical excision and immunotherapy.
Step-by-step explanation:
The most dangerous type of skin cancer is malignant melanoma. Melanoma is a cancer characterized by the uncontrolled growth of melanocytes, the pigment-producing cells in the epidermis. It is highly metastatic and can be difficult to detect before it has spread to other organs. Treatment typically involves surgical excision and immunotherapy.