Clubbed nails. Increased curvature of the nail plate may be due to a wide
variety of causes. In this patient, the large, convex nails are a hereditary
anomaly and were found to be present in both father and brother. Other causes
of clubbing of the nails in children include cyanotic congenital heart disease,
cystic fibrosis, and chronic inflammatory bowel disease.
Color Atlas of Pediatric
Samuel Weinberg, Neil S. Prose, Leonard Kristal
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