Nevus, nevi (plural)

Benign pigmented spot on the skin, such as a mole, that is a cluster of melanocytes and supportive tissue. In contrast, dysplastic nevi, or atypical moles, are melanocytic lesions that can be precursors to melanoma. Dysplastic nevi are distinguished by histology; however, they may also have certain clinical characteristics (e.g., increased diameter, lack of pigment uniformity).