Neonatal blue-light phototherapy induced a blistering reaction followed by eruption of melanocytic nevi on the exposed skin surface of a child with transient neonatal porphyrinemia. New nevi are still developing 4 years after the triggering event. The role of phototoxicity-induced epidermal injury, that of porphyrins and the influence of neonatal blue-light therapy, in this unique phenomenon are discussed.
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