[Cephalohemoatoma as the first manifestation of congenital factor XIII deficiency].

Congenital factor XIII deficiency is a rare hereditary disorder characterized by a marked tendency to bleeding. We describe a male newborn with inherited factor XIII deficiency. The patient was from a family without known antecedents and presented cephalohematoma as the first manifestation of the disease. This presentation is very unusual. The patient was diagnosed during the neonatal period and was successfully treated with substitution therapy. Early diagnosis and treatment of this disorder are important to prevent complications of severe bleeding.