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| Fig. 68.2 Benign clubbing of the nails inherited in an autosomal dominant fashion. |
Clubbing refers to the increased bilateral curvature of the nails with proliferation of the soft tissues restricted to the distal phalanges (Fig. 68-2). It causes an increase in the emergence angle of the nail to equal or greater than 180 degrees. There are diverse causes of clubbing, including congenital or genetic factors, but 80% of clubbing is associated with respiratory ailments.
