This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hemophilic Arthritis, Subject name: Orthopaedics
[{'content': 'All are features of haemophilic knee joint, EXCEPT: \nSelect and explain. \nA. Juxta articular osteosclerosis, B. Sub chondral cyst formation, C. Widening of intercondylar notch, D. Squaring of patella', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' ie juxta articular osteosclerosis Hemophilic arthropathy : is common in both A & B types of hemophilia. It is not common in other inherited disorder of coagulation, such as von Willebrand ds. or factor V deficiencyRadiographs of joints reflect the stage of diseaseIn early stages these is only capsule distention,Laterjuxtaarticular osteopenia*,marginal erosions*subchondral cysts*.joint space is narrowed* andthere is bone overgrowth.The changes are similar to those observed in osteoarthritis.Unique feature of hemophilic arthropathy arewidening of the femoral intercondylar notch*enlargement of proximal radius, andsquaring of the distal end of the painMC joint involved in hemophilic arthropathy - Knee*", 'role': 'assistant'}]