Clubbing of the fingers
Clubbing of the fingers or the nails is a deformity in which the nails become wider than the rest of the finger. It is also known as nail clubbing or digital clubbing and has 5 stages according to how severe it is. This sign is commonly found in ailments affecting the heart and the lungs, including lung cancer, cystic fibrosis, many cardiovascular diseases, and endocarditis.