Lichen Nitidus. Presented by Dr. Max S. Wien and Dr. M. O. Perlstein. Mrs. A. A., aged 50, presents an eruption of one year's duration, with no subjective symptoms. She states that the eruption first appeared about both knees and gradually spread distally and proximally. The eruption on the arms first appeared at the elbows and slowly extended. On both upper extremities are pinhead-sized, shiny papules occurring in groups. The lesions are yellow, waxy and polygonal and retain their individual contours. The lower extremities from the hips to the lower third of the legs present discrete, follicular, cayenne pepper lesions which tend to be keratotic. Discrete lesions are scattered over the abdomen, breasts and axillae, and a few are present on the shoulder. A roentgenogram of the chest revealed a slight increase of the hilus markings in both lungs. The Mantoux reaction (with a 1: 10,000 solution of old tuberculin)