Pityriasis lichenoides et varioliformis acuta during pregnancy.

Pityriasis lichenoides et varioliformis acuta (PLEVA) is a disorder of unknown aetiology that occurs at any age and can be localized on the skin and on the mucosas. We report the case of a 24-year-old woman who presented PLEVA at her 20th week of gestation. This is, to our knowledge, the second case of PLEVA during pregnancy reported in literature. We report this case for the importance of the diagnosis of PLEVA during pregnancy because of the possible involvement of the mucosal membranes, and in particular of the vagina or cervical os of the uterus, where it may cause premature labour and/or premature rapture of the membranes.