Final answer:
The four characteristics of a nevus that suggest melanoma are asymmetry, irregular borders, color variation, and large diameter.
Step-by-step explanation:
Four characteristics of a nevus that are suggestive of melanoma are:
- Asymmetry - the two sides are not symmetrical
- Borders - the edges are irregular in shape
- Color - the color is varied shades of brown or black
- Diameter - it is larger than 6 mm (0.24 in)
These characteristics are often referred to as the ABCD rule, and can help with the early detection of melanoma. If you notice a nevus with these characteristics, it is important to consult a doctor for further evaluation.