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n. thickening of the tissues at the bases of the finger and toe nails so that the normal angle between the nail and the digit is filled in. The nail becomes convex in all directions and in extreme cases the digit end becomes bulbous like a club or drumstick. Clubbing is seen in pulmonary tuberculosis, bronchiectasis, empyema, infective endocarditis, cyanotic congenital heart disease, lung cancer, and cirrhosis and as a harmless congenital abnormality.

Subjects: Medicine and Health.

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