GPT and isolated congenital adermatoglyphia: And those with ADG had significantly higher AST and ALT levels than those without ADG; a median ALT change of + 2 (IQR: − 3,8) in patients with ADG vs 0 (IQR: − 5,5) in patients without ADG (p = 0.029), and a median AST change of + 2 (IQR: − 3,8) in patients with ADG vs 0 (IQR: − 5,5) in patients without ADG (p = 0.028).