title: 'Atypical' blue nevus--a benign variant of cellular blue nevus. Presentation of three cases.
abstract: Three cases of 'atypical' blue nevus presented almost identical histological findings differing from both benign cellular blue nevus and malignant blue nevus or malignant melanoma, and suggesting malignancy. Long-term follow-up--in one case 19 years--indicates that this pigmented tumor is a benign variant of blue nevus.
mesh_terms: D000328:Adult; D001706:Biopsy; D002675:Child, Preschool; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D009508:Nevus, Pigmented / Q000175:diagnosis / Q000473:pathology; D012867:Skin / Q000473:pathology