Pityriasis lichenoides chronic after measles-mumps-rubella vaccination

摘要

Pityriasis lichenoides is a rare disease of unknown origin. Infection has been suggested as one reported cause through antigenic stimulation. We report the case of a 5-year-old boy who developed pityriasis lichenoides chronica (PLC) 10 days after measles-mumps-rubella (MMR) vaccine injection which lasted approximately 10 months.A 5-year-old Caucasian boy was referred for a chronic, scaly, papular eruption evolving for the past 4 months. His past medical history was notable for febrile convulsions, chickenpox and tonsillectomy. Eruption started abruptly 10 days after the second injection of MMR vaccine (R.O.R. Vax; Sanofi Pasteur MSD, Lyon, France) whereas a prior injection of this vaccine had been performed without any complication 2 years prior. The parents denied any newly introduced drug that could have been given either simultaneously or prior to vaccination.