Pathology A 9 year old boy with elevation in both PT and A PTT. 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 elevation in both PT and A PTT. What is the diagnosis? - ✓ Correct Answer: D. Defect in common pathway