psoriasiform hyperplasia

(redirected from regular acanthosis)

psoriasiform hyperplasia

A nonspecific, histologically defined appearance that consists of regular elongation of rete ridges, suprapapillary thinning, mild spongiosis, telangiectasis of blood vessels in the papillary dermis and fusion of foot processes.

Aetiology
Seborrhoeic dermatitis, late secondary syphilis.
References in periodicals archive ?
Because PsA was suspected, a skin biopsy of the chest was obtained that showed parakeratosis, hyperkeratosis, and regular acanthosis. Histologic findings were consistent with psoriasis (Figure 4).
Examination of the biopsy specimen obtained from the knee revealed regular acanthosis and hypogranulosis, mild spongiosis, and intraepidermal clusters of neutrophils (Munro's microabscess) in the epidermis, and the diagnosis of psoriasis was confirmed.
The histopathology from the lesion showed parakeratosis, some hyperkeratosis, regular acanthosis, suprapapillary thinning and neutrophilic exocytosis (Figure 2).