Follicular psoriasis

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Abstract
Ten patients with follicular psoriasis were studied. Two distinct clinical types were distinguished. An adult form, seen especially in women, showed widespread psoriasis in which follicular lesions occurred on both thighs as part of the efflorescence. Follicular lesions were aggregated to form isolated asymmetrical plaques on the trunks of children with inactive psoriasis. Histological findings in follicular psoriasis varied according to the age of the lesion. In the early lesion there was a marked dermal infiltrate in which the mast cells were prominent but the hair follicle appeared normal. Older lesions had nucleated cells in the ostium of the follicle. Findings suggested that the hair follicle may be affected as part of psoriatic involvement of the integument.

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