Benmamán O, Sánchez J L
Department of Dermatology, University of Puerto Rico, San Juan.
Am J Dermatopathol. 1988 Jun;10(3):189-96. doi: 10.1097/00000372-198806000-00002.
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.
副银屑病这一术语指的是一组病因不明的慢性无症状鳞屑性皮肤病，对于构成该组的不同病症的分类学和命名，尤其是慢性苔藓样糠疹（PLC）和小斑块状副银屑病（SPP），目前仍存在争议。为了确定这两种皮肤病独特的临床病理特征，我们对44例表现出这两种疾病中任何一种典型临床和组织学表现的患者进行了前瞻性研究。SPP的临床特征为躯干和四肢近端出现鳞屑性椭圆形斑块。海绵形成是主要的组织病理学特征，无纤维化或巨噬细胞。PLC表现为躯干和四肢出现鳞屑性丘疹疹，组织学特征为界面性皮炎。我们得出结论，足够的临床和组织学特征可区分这两种实体，并且我们建议副银屑病这一术语仅用于指代SPP和大斑块状副银屑病。
