A 9-year-old boy presents to the clinic for evaluation of easy bruising. Investigations confirm the diagnosis of hemophilia A. Which of the following is the most common presentation of hemophilia A?: (A) hematuria, (B) melena, (C) hemarthrosis, (D) pressure neuropathy
Answer is C. The most common presentation is hemarthrosis with pain in a weight-bearing joint such as the hip, knee, or ankle. Hematuria is also common. Bleeding can occur at almost any site without prior trauma.