[A case of yellow nail syndrome presenting as recurrent pneumonia].

We report a case of yellow nail syndrome (YNS) associated with recurrent episodes of pneumonia. The patient, a 31-year-old female, presented with yellow nails, chronic bronchitis and pleural effusion. The etiology of YNS remains unknown although it has been postulated to be associated with lymphatic abnormalities. YNS is a rare disease with only 22 cases reported in Japan. However, YNS is often associated with respiratory infections, and should thus be borne in mind.