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Course: Generalized, Linear Hyperkeratotic Papules With Numerous White Spicules and Comedo-like Plugs

CME Credits: 1.00

Released: 2023-01-04

A school-aged boy presented with occasionally pruritic, generalized hyperkeratotic papules with central white spicules and comedo-like plugs that were in a linear distribution on his face, trunk, and extremities since birth. Some of the eruptions on his trunk had spontaneously resolved with developmental growth. There was nonconsanguineous marriage of his parents, and no family members had similar lesions. The patient was otherwise in good general health and without developmental delay. Physical examination showed generalized, linear hyperkeratotic papules with numerous central small filiform keratotic white spicules and brown plugs on the head, face, neck, trunk, and bilateral upper and lower extremities (, A and B), including his palms and soles along Blaschko lines, accompanied with alopecia of the scalp and eyebrows. The examination of nails, mucosae, and teeth was unremarkable. No extracutaneous involvement was observed. Dermoscopic examination showed many central white spines on the face (, C) and brown cores surrounded by yellow crater-like rings on the right palm. A skin biopsy specimen was taken from the hyperkeratotic papules with white spicules on his right thigh (, D).


Educational Objective
Based on this clinical scenario and the accompanying image, understand how to arrive at a correct diagnosis.


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