Interpret the following results: • Patient: 12-year-old boy with unexplained bruising, swollen knee joints, and prolonged bleeding from injuries • Screening tests: o PT = 12.2 sec (control: 11.5-13.3 sec)/INR: 1.09 o APTT = 57 sec (control: 23-32 sec) o Bleeding time = 5 min (control: 2-10 min) Pending results from confirmation tests, this patient could be suffering from
A) An intrinsic pathway problem
B) An extrinsic pathway problem
C) A primary hemostasis problem
D) A common pathway problem
Ans: An intrinsic pathway problem
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