transient erythroporphyria of infancy transient erythroporphyria of infancy transient erythroporphyria of infancy is a cutaneous condition reported in infants exposed to blue lights for the treatment of indirect hyperbilirubinemia characterized by marked purpura in skin exposed to the uv light.: 526 transient erythroporphyria of infancyother namespurpuric phototherapy-induced eruptionspecialtydermatology