What is a common benign tumor of the skin called?

A common benign tumor of the skin is referred to as a nevus, commonly known as a mole. Nevi are typically small, well-circumscribed, and can vary in color from tan to dark brown. They are formed from clusters of melanocytes, the cells that produce pigment in the skin. Nevi are usually harmless and often do not require treatment unless there are changes in size, shape, or color, which may prompt further examination for potential malignancy.

The distinction of nevi as benign is significant because it sets them apart from other skin lesions, such as atypical nevi, which may carry a higher risk of developing into melanoma, or carcinoma, which is a type of malignant tumor. Melanoma, the most serious form of skin cancer, originates from melanocytes and is characterized by the uncontrolled growth of these cells. Thus, the selection of nevus as the correct answer underscores its classification as a typical, benign skin tumor in contrast to more serious conditions associated with skin malignancies.