Resumen

SCIANCALEPORE, GP; CIGNA, ML; YARZA, ML  y  GREES, SA. Pityriasis lichenoides: a retrospective clinical and epidemiological study of 49 pediatric patients. Rev. argent. dermatol. [online]. 2013, vol.94, n.1. ISSN 1851-300X.

Background: the pityriasis lichenoides (PL), a papulosquamous disease, affects mostly children. Present an acute form, pytiriasis lichenoides et varioliformis acute (PLEVA) and other chronic, chronic lichenoid pytiriasis (PLC). Objetive: to describe the caracheristics of patients with clinic and histopathological diagnosis of PL. Compare our results with those found in the literature. Materials and Methods: clinical records and pathology reports of 49 patients who consulted between March 2000 and March 2011. Data were analyzed using SPSS 11.5. Results: of 49 patients with PL, 17 presented PLEVA and 32 PLC. The average age of onset of PLEVA was 6 years and 10 years for PLC. Males predominate in PLEVA. The lesions most frequently found were: papules and erythematous papules in PLEVA, scales in PLC and hypocromic macules as residual dyschromia. 14 of 49 patients showed morbid associations. Conclusions: the PL can be divided into acute and chronic forms, despite the existence of both types of lesions in the same patient. PLEVA was presented at younger age, predominantly in males. From the patients who had co-morbidities, the most of them, compromised immunity.

Palabras clave : Pityriasis lichenoides in children; Acute pityriasis lichenoides PLEVA; Chronic lichenoid pityriasis PLC.