The diagnosis is based on the combination of the symptoms. Generally, people are diagnosed with<unk>  if they have two or three of the three classical symptoms<unk>  nails, lymphedema and pleural effusion). The nail changes are considered essential for the diagnosis, but they can be subtle. Pulmonary function testing can show obstruction of the airways. People with pleural effusions may show evidence of restriction in lung volumes due to the fluid. Analysis of the fluid in pleural effusions generally shows high levels of protein but low levels of cholesterol and lactate dehydrogenase, but about 30% of effusions are chylous (chylothorax) in that they have the characteristics of lymph. A lymphogram may be performed in people with lymphedema. This can show both under developed (hypoplastic) lymphatic ducts and dilated ducts. Dye may be found in the skin months after the initial test. Scintigraphy of lymph flow (lymphoscintigraphy) shows delays in drainage of lymph (sometimes asymmetrically), although this test can also be normal.
Yellow nail syndrome
Green nail syndrome
Shell nail syndrome
Blue toe syndrome
Freiberg disease
Median nail dystrophy
Haff disease
Scimitar syndrome