Congenital FX Deficiency Rio Tercero: A New Heterozygous Missense Mutation (Cys241Gly) with a Potentiating Effect by a Polymorphism (c. 503-57C>T).

Objective: The aim was to report a new family with congenital FX deficiency.

Patients And Methods: The proposita is a 41 year old female with a moderate bleeding tendency (easy bruising, menorrhagia). Parents were not consanguineous.