What is a nevus commonly known as?

A nevus is commonly referred to as a birthmark. In dermatological terms, a nevus typically describes a benign growth on the skin, which can be present at birth or develop over time. These growths are often pigmented and can take various forms, such as moles. The distinction as a birthmark is significant because it highlights the common perception of nevi as natural, benign skin features that many people have. The other terms listed do not accurately describe a nevus: a wart is a different type of skin growth caused by a viral infection, skin cancer refers to malignant conditions affecting the skin, and a scar results from the healing process after an injury or surgery. Understanding these differences is crucial for recognizing various skin conditions and their implications in medical practice.