| • | often first noticed around puberty |
| • | characteristically situated over the shoulder, anterior chest, or scapula |
| • | = a sharply demarcated hyperpigmented patch (a smooth muscle hamartoma may underlie a Becker’s nevus) |
| • | histology: epidermis – slight acanthosis and papillomatosis; hyperpigmentation of basal layer (normal number of melanocytes) |
| • | clinical ddx: congenital nevus (no difficulty histologically distinguishing the two: Becker’s nevus does not have nevocellular nevus cells) |
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