| parapsoriasis | The term applied to a group of relatively uncommon inflammatory, maculopapular, scaly eruptions of unknown aetiology and resistant to conventional treatment. Eruptions are both psoriatic and lichenoid in appearance, but the diseases are distinct from psoriasis, lichen planus, or other recognised dermatoses. Proposed nomenclature divides parapsoriasis into two distinct subgroups, pityriasis lichenoides and parapsoriasis en plaques (small- and large-plaque parapsoriasis). (12 Dec 1998) |
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| parapsoriasis guttata | A subgroup of parapsoriasis itself divided into acute and chronic forms. The acute form is characterised by the abrupt onset of a generalised, reddish-brown, maculopapular eruption. Lesions may be vesicular, haemorrhagic, crusted, or necrotic. Histologically the disease is characterised by epidermal necrolysis. The chronic form shows milder skin changes with necrosis. An important variant of the chronic form is lymphomatoid papulosis. (12 Dec 1998) |
| parapsoriasis lichenoides | A rare condition that simulates chronic radiodermatitis in appearance; may eventuate as mycosis fungoides. Synonym: parakeratosis variegata, parapsoriasis lichenoides. Poikiloderma of Civatte, reticulated pigmentation and telangiectasia of the sides of the cheeks and neck; common in middle-aged women. Synonym: Civatte's disease. (05 Mar 2000) |
| parapsoriasis lichenoides et varioliformis acuta | pityriasis lichenoides et varioliformis acuta |
| parapsoriasis varioliformis | pityriasis lichenoides et varioliformis acuta |
| small plaque parapsoriasis | See: parapsoriasis en plaque. Synonym: small plaque parapsoriasis. (05 Mar 2000) |