CLUBBING Mnemonic for Causes of Nail Clubbing C - Cyanotic Heart Disease, Cystic Fibrosis L - Lung Cancer, Lung Abscess U - Ulcerative Colitis B - Bronchiectasis B - Benign Mesothelioma I - Infective Endocarditis, Idiopathic Pulmonary Fibrosis N - Neurogenic Tumors G - Gastrointestinal Disease #CLUBBING #Mnemonic #Nail #Fingernail #Differential #Diagnosis