Comparative Clinicopathological Study on Pityriasis Lichenoides Chronica and Small Plaque Parapsoriasis
作者:
Oliva Benmamán,
Jorge Sánchez,
期刊:
The American Journal of Dermatopathology
(OVID Available online 1988)
卷期:
Volume 10,
issue 3
页码: 189-196
ISSN:0193-1091
年代: 1988
出版商: OVID
关键词: Pityriasis lichenoides chronica;Small plaque parapsoriasis;Asymptomatic scaly dermatoses;Clinicopathologic features
数据来源: OVID
摘要:
The term parapsoriasis refers to a group of chronic asymptomatic scaly dermatoses of unknown etiology about which there is still controversy over the nosology and nomenclature of the different conditions that comprise the group, particularly pityriasis lichenoides chronica (PLC) and small plaque parapsoriasis (SPP). In an attempt to establish the distinctive clinicopathologic features of these two dermatosis, we prospectively studied 44 patients who presented with the typical clinical and histologic picture of either of these two diseases. SPP was clinically characterized by scaly oval plaques on the trunk and proximal aspect of extremities. Spongiosis was the salient histopathologic feature, with absence of fibrosis or melanophages. PLC presented with a scaly papular eruption over the trunk and extremities and histologically was characterized by an interface dermatitis. We conclude that sufficient clinical and histologic features differentiate these two entities and we propose that the term parapsoriasis be used only to designate SPP and large plaque parapsoriasis.
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