Target blue nevus.
In two cases of target blue nevi of the foot, both lesions displayed a distinctive concentric pigmentary variation. This correlated histologically with a peripheral alteration of dermal collagen accompanied by a focal regression or differentiation of blue nevus cells. The resulting distinctive target blue nevus can be clinically differentiated from a malignant melanoma.
D000328:Adult; D005534:Foot Diseases / Q000175:diagnosis* / Q000473:pathology; D006801:Humans; D008297:Male; D009508:Nevus, Pigmented / Q000175:diagnosis* / Q000473:pathology; D012878:Skin Neoplasms / Q000175:diagnosis* / Q000473:pathology