Giant congenital melanocytic nevi are large, dark-colored lesions on the skin. They’re generally not harmful but may increase your risk of conditions like melanoma. Treatments are available. A giant ...

A mole is an unwanted skin growth. It usually looks like a flat or raised bump that’s the color of your skin or darker. Most people get moles as a teenager or adult. Some moles are present at birth.

A blue nevus is a benign type of mole. It may appear as a blue lump on the skin. A blue nevus may be present at birth or develop as a person ages. Healthcare professionals refer to more than one blue ...

Some dysplastic nevi look extremely similar to melanoma and a biopsy may be needed to tell them apart. Dysplastic nevi (singular: nevus), also called Clark’s nevi, are atypical moles that look ...

The dysplastic nevus initially was described in the 1980s as a mole with increased risk of developing melanoma and requiring total removal. However, dermatopathologists now consider dysplastic nevi to ...

Spitz nevus, or Spitz nevi, is a rare, noncancerous skin growth that typically impacts people under 35 years old. It often presents as rapidly growing moles and is common on the head, face, and legs.