melanoma, cutaneous malignant, susceptibility to, 2 (Monarch Disease Ontology identifier MONDO_0007964) is clinically atypical nevi (usually exceeding 5 mm in diameter and having variable pigmentation and ill defined borders) with an increased risk for development of non-familial cutaneous malignant melanoma. Biopsies show melanocytic dysplasia. Nevi are clinically and histologically identical to the precursor lesions for melanoma in the B-K mole syndrome. (Stedman, 25th ed). Also known as: Atypical Mole syndrome, B-K Mole syndrome, dysplastic nevus syndrome, familial dysplastic nevi, melanoma, cutaneous malignant, 2, melanoma, cutaneous malignant, susceptibility to, type 2.