Yellow nail syndrome
(重定向自Primary lymphedema associated with yellow nails and pleural effusion)

Yellow nail syndrome, also known as "primary lymphedema associated with yellow nails and pleural effusion," is a very rare medical syndrome that includes pleural effusions, lymphedema (due to under development of the lymphatic vessels) and yellow dystrophic nails. Approximately 40% will also have bronchiectasis. It is also associated with chronic sinusitis and persistent coughing. It usually affects adults.