Respiratory Ddx clubbing
Interstitial lung disease
Malignancy (bronchigenic carcinoma, mesothelioma)
Suppurative lung disease (bronchiectasis, abscess, empyema, cystic fibrosis)
GI Ddx clubbing
IBD
Hepatic cirrhosis
GI lymphoma
Coeliac disease
Other causes of clubbing
Thyroid acropachy (Graves' disease) Familial
Cardiovascular Ddx clubbing
Cyanosis congenital heart disease
Infective endocarditis
Atrial myxoma