Yellow nail syndrome.

Yellow nail syndrome (YNS) is a rare disorder defined by the triad of yellow nail discoloration, lymphedema, and respiratory tract disease. Only two of the three signs should be present to diagnose YNS; however, this can be challenging as patients often do not exhibit all three signs concurrently. The association between YNS and malignancy has led to the hypothesis that YNS may be paraneoplastic. Treatment may include oral vitamin E for nail discoloration, serial thoracenteses for pleural effusions, and compression garments along with bandaging for lymphedema.