Generalized Linear Porokeratosis in a Bilateral Distribution: An Unusual Presentation

An 8-year-old girl was seen for asymptomatic flat to raised hyperpigmented plaques distributed in a linear pattern over multiple segments of her body present 1 year of age. The eruption initially started as an itchy papule over the left lateral malleolus, which developed into hyperpigmented plaque and gradually extended linearly over a period of 2-3 months to involve the leg. Over the next year, similar lesions appeared on the hands and left side of the body. Most of the lesions progressed in size; however, a few lesions on the extremities resolved partially, becoming hyperpigmentation. There was no further progression of the eruption in the following 6 months. There was no history of erosions, blisters, or comedone-like lesions. There was no history of developmental delay or mental retardation. There was no relevant family history. (SKINmed. 2022;20:220-223).