- History - 11 year old male - Presented in emergency room with recent onset of easy bruising, bleeding gums, and persistent epistaxis (nosebleeds) - No history of recent viral infection, and no family history of bleeding disorders 2 - Answer 2 - Further Lab Studies - Question 3 - Bone marrow biopsy - What is the most likely diagnosis? - Aspirate: - Erythrocyte and granulocyte maturation within normal limits Megakaryocytes appear normal in number and morphology - Coagulation - PT, PTT and TT normal.