Hemoptysis as a presentation of mild hemophilia A in an adult.

It is not unusual for mild hemophilia A to escape detection into adolescent years and it is often detected following dental extractions or other mild trauma. The present report describes a patient shown to have only 8 to 9 percent factor VIII activity at age 30 years. The presentation of recurrent mild hemoptysis with upper respiratory tract infections is unusual and of interest in the differential diagnosis of hemoptysis.