Causes of clubbing are fairly anecdotal and usually remain the remit of consultant ward rounds, but here they are:
C – Cyanotic heart disease, cystic fibrosis
L – Lung and liver (Hepatopulmonary syndrome, Lung cancer, Lung abscess)
U – Ulcerative colitis, malabsorption and Crohn’s disease
B – Benign mesothelioma
B – Bronchiectasis
I – Interstitial fibrosis, Infective endocarditis
N – Not COPD – if someone has COPD and clubbing, look for another cause
G – Graves disease (thyroid acropachy)
unicyclemedic 