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INTRODUCTION
Keratosis pilaris (KP) is a cutaneous disorder of unknown etiology. It presents as symmetric, keratotic follicular papules on the extremities and the cheeks [1]. Rarely, it can be generalized. It usually develops in early childhood, with remission by adulthood.
There are three distinct variants of KP that have been identified: keratosis pilaris atrophicans, erythromelanosis follicularis faciei et colli and keratosis pilaris rubra (KPR). KPR is characterized by significant widespread erythema and persistence after the onset of puberty.
CASE REPORT
18-year-old Arabic male presented to the outpatient clinic in the dermatology department at King Fahd Hospital of the University with a 2-year history of mildly pruritic facial erythema. The intensity of the erythema waxed and waned but never completely resolved. After few months, the facial erythema became persistent irrespective of the season. Besides, there was generalized skin eruption involving the trunk and upper and lower extremities. There was no history of photosensitivity. Past medical and family history was unremarkable. Physical examination revealed facial erythema affecting mainly the cheeks and ears (Fig. 1 [See PDF]). Follicular hyperkeratotic papules with a rough, sandpaper quality and variable erythema on the chest, back, upper limbs and lower limbs (Fig. 2 [See PDF]). His complete blood count, liver function and renal function tests were normal. Antinuclear antibodies, anti double stranded DNA, anti Ro and anti Jo were negative. A punch biopsy specimen from...