pityriasis rubra pilaris

pityriasis ru·bra pi·lar·is -'rü-brə-pi-'lar-əs n a chronic dermatitis characterized by the formation of papular horny plugs in the hair follicles and pinkish macules which tend to spread and become scaly plaques

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a chronic, inflammatory, cutaneous disease characterized by a patchy rash that begins on the scalp, chest, or face and progresses down the body; there are numerous tiny, red to brown, follicular papules topped by horny plugs that have embedded hairs; there may also be solid confluent hyperkeratosis of the palms and soles with a tendency to fissuring.