Acquired deficiency of vitamin K-dependent clotting factors due to brodifacoum ingestion.

Brodifacoum, also known as a superwarfarin, is a four-hydroxycoumarin derivative. It exerts an anticoagulant effect by inhibiting the reduction of vitamin K-2,3 epoxide, thereby decreasing the production of vitamin K-dependent clotting factors. It is a readily available rodenticide that has been associated with accidental ingestions in children.