Rare case of Bart syndrome! Bart syndrome is a clinical sign of epidermolysis bulbosa. It is characterized by the association of congenital localized absence of skin, lesions of the mouth mucosa, and dystrophic nails. The disease is inherited by autosomal dominant transmission with complete penetrance but variable expression. This means that children of an affected parent that carries the gene have a 50% chance of developing the disorder, although the extent to which they are affected is variable.