Yellow nail syndrome is a very rare disorder that has been noticed since 1927. 1 It affects both sexes equally, with an age of more than 40 years being typical. 2 The exact pathogenesis remains unclear but lymphatic system anatomical and functional abnormalities remain the predominant theory, while other hypotheses suggest autoimmune, cancer, and paraneoplastic roles. 3 Also, a very rare familial case has been reported. 1 Although it is only found in 27%-60% of patients The diagnosis depends on the presence of 2 out; of the characteristic nail changes, respiratory tract infection, and lymphedema. The latter occurs in up to 80% of cases and