Physiology A 9-year-old boy with elevated both PT and aPTT What is the diagnosis? A Defect in extrinsic pathway B Defect in Intrinsic pathway C Platelet function defect D Defect in common pathway 💡 Explanation A 9-year-old boy with elevated both PT and aPTT What is the diagnosis? ✓ Correct Answer: D. Defect in common pathway