Blistering patch on 
infant's forearm

A white male, aged 10 weeks, presented with a lesion on the left forearm. His mother reported that the lesion, initially suspected to be from trauma, had persisted for two weeks without resolution. It appeared asymptomatic throughout that time. Examination revealed a reddish-orange patch of approximately 2 cm on the patient’s dorsal left forearm with superimposed blistering. Stroking the skin ...