[Answered]: A 12-year-old boy underwent tooth extraction in…

A 12-year-old boy underwent tooth extraction in preparation for orthodontia. Persistent bleeding followed. History was remarkable for bruising and frequent epistaxis. The patient’s mother also experienced easy bruising and menorrhagia. Physical examination revealed several medium sized ecchymotic lesions on the lower extremities. Laboratory findings were as follows: TEST PATIENT RESULTS REFERENCE RANGE PT 12.0 10-14 sec aPTT 39.5 23-33 sec Bleeding Time >15 min 2-9 min Plt Count 300 bill/L 150-450 bill/L What other test results would be helpful to determine diagnosis? What is a possible diagnosis for the patient?