title: Multiple agminated juvenile melanoma arising on a hyperpigmented macule.
abstract: A case of multiple agminated juvenile melanoma (MAJM) arising on a hyperpigmented macule is reported. The patient, a 1-year-old boy, had 9 small nodules on an irregular, hyperpigmented macule on the right shoulder. Histologically, the nodules contained nests of spindle-shaped cells in their epidermis and at the dermoepidermal junction, and the hyperpigmented macule exhibited increased melanin granules in the basal layer and small nests of epithelioid cells. We concluded that MAJM on a hyperpigmented macule is the subtype of the nevus spilus.
authors.affiliation: Department of Dermatology, Iwate Medical University, School of Medicine, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Akasaka
authors.forename: Y
authors.initials: Y
authors.lastname: Imamura
authors.forename: S
authors.initials: S
authors.lastname: Kon
mesh_terms: D006801:Humans; D007223:Infant; D008297:Male; D009378:Neoplasms, Multiple Primary / Q000473:pathology*; D018332:Nevus, Epithelioid and Spindle Cell / Q000473:pathology*; D009508:Nevus, Pigmented / Q000473:pathology*; D012878:Skin Neoplasms / Q000473:pathology*