Gelmetti C, Rigoni C, Alessi E, Ermacora E, Berti E, Caputo R
Department of Dermatology and Pediatric Dermatology I, University of Milan, Italy.
J Am Acad Dermatol. 1990 Sep;23(3 Pt 1):473-8. doi: 10.1016/0190-9622(90)70243-b.
Pityriasis lichenoides is usually classified into an acute and a chronic form. From a review of 89 cases of the disease seen since 1974 it seems that a more realistic classification into three main groups, according to the distribution of pityriasis lichenoides lesions, could be made, namely, a diffuse, a central, and a peripheral form, each characterized by a different clinical course. Conversely, no correlations were detected in our series between the severity of skin lesions and their distribution or the overall course of the disease. None of our cases suggests the possible evolution of pityriasis lichenoides into lymphomatoid papulosis. Although no infectious causative agent has been identified, a viral origin seems likely in some cases. Most patients responded favorably to UVB irradiation. Our conclusions are (1) that pityriasis lichenoides is probably a clinical disorder with a diverse etiology and (2) that its classification by distribution seems more useful than its subdivision into an acute and a chronic form.
苔藓样糠疹通常分为急性和慢性两种类型。回顾自1974年以来所见的89例该疾病病例，根据苔藓样糠疹皮损的分布情况，似乎可以更实际地将其分为三个主要组，即弥漫型、中央型和周边型，每组都有不同的临床病程。相反，在我们的系列病例中，未检测到皮肤损害的严重程度与其分布或疾病的整体病程之间存在相关性。我们的病例均未提示苔藓样糠疹可能演变为淋巴瘤样丘疹病。虽然尚未确定感染性致病因子，但在某些情况下似乎可能起源于病毒。大多数患者对UVB照射反应良好。我们的结论是：（1）苔藓样糠疹可能是一种病因多样的临床病症；（2）根据分布情况对其进行分类似乎比将其细分为急性和慢性类型更有用。
