Abstract
Yellow nail syndrome (YNS) is a condition characterized by yellow-green coloration of nails, respiratory manifestations, and lymphedema. This article presents a case of a 52-year-old patient with membranous glomerulonephritis, hospitalized at the National Research Institute for Tuberculosis and Lung Diseases in Warsaw because of suspected allergic aspergillosis. Based on clinical and radiological findings, diagnosis of YNS was established. Treatment of renal disease did not affect the course of yellow nail syndrome. During the two-year follow-up, despite stable renal parameters, progression of respiratory manifestations (bronchiectasis, pleural effusions) was observed.