This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Orthopaedics
[{'content': 'Which of the following is not seen in pseudogout - \nSelect and explain. \nA. Small joints affected, B. Large joints affected, C. Chondrocalcinosis, D. Deposition of calcium pyrophosphate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: It is one of the forms of "calcium pyrophosphate dihydrate" (CPPD) arthropathy.\nPseudogout commonly involves the larger joints.Knee joint is most commonly involved; other sites are wrist, elbow, shoulder, ankle. Involvement of small joints is uncommon.\nThe radiologic hallmark of CPPD is "chondrocalcinosis". Chondrocalcinosis is seen as punctate and/or linear radiodense deposits in fibrocartilaginous joint menisci or articular hyaline cartilage.', 'role': 'assistant'}]