EXTRAORDINARY CASE REPORT: PDF OnlyLichen Planus with Predominant Plasma Cell InfiltrateRoustan, G. M.D.; Hospital, M. M.D.; Villegas, C. M.D.; Yus, E. Sanchez M.D.; Robledo, A. M.D.Author Information From the Department of Dermatology, Hospital U. San Carlos, Madrid, Spain. The American Journal of Dermatopathology: June 1994 - Volume 16 - Issue 3 - p 311-314 Buy Abstract We herein report the case of a patient with lichenoid plaques on the lower extremities and anonychia of all toenails. Histologically, the eruption showed typical features of lichen planus, with the exceptional finding of a lichenoid infiltrate composed mostly of plasma cells. Only two other similar cases have been reported. The explanation for the numerous plasma cells remains unknown although such cases may represent a new histologic variant. © Lippincott-Raven Publishers.