“…3,4 The syndrome is extremely rare and the majority of reported cases are from Japan, although cases have now been reported around the world. [1][2][3][4][5][6] Of the very few familial cases have been previously reported, all have demonstrated autosomal dominant inheritance. 1 The condition is characterized by the following features: (1) congenital occurrence, (2) unilateral or bilateral index finger involvement, (3) autosomal dominant inheritance, (4) variability in nail appearance, and (5) underlying bony abnormalities.…”