Parapharyngeal hematoma following transesophageal echo in a patient with hemophilia A.

Hemophilia A is an X-linked disorder caused by deficiency of Factor VIII. Postoperative patients with mild hemophilia A, or those requiring intensive factor replacement, should be proactively screened for factor inhibitor development. This is a major complication of factor replacement that can induce severe factor resistant coagulopathy and life-threatening bleeding.