The U.S. Food and Drug Administration has approved Tretten, Coagulation Factor XIII A-Subunit (Recombinant), the first recombinant product for use in the routine prevention of bleeding in adults and children who have a rare clotting disorder, known as congenital Factor XIII A-subunit deficiency. Congenital Factor XIII deficiency is an extremely rare genetic disorder. Patients with this deficiency do not make enough Factor XIII, a protein that circulates in the blood and is important for normal clotting. Factor XIII is composed of two subunits, A and B.

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