<prompt> After tonsillectomy, a 9 year old child is having continuous bleeding. Bleeding time and PTT are prolonged. Platelet count and PT are normal. What is your diagnosisVon willebrand diseaseVitamin K deficiencyImmune thrombocytopenic purpuraHemophilia A  <response>: Ans. a Von Willebrand diseaseRef: Robbins 9thpg 661a. Von willebrand disease: True: Bleeding time and aPTT prolonged, PT and platelet count normalb. Vitamin K deficiency: False: PT prolongedc. Immune thrombocytopenic purpura: False aPTT is normald. Hemophilia A: Flase: Bleeding time normal 