Arthrology and Infections — MCQs

Q: Based on the image provided below, what is the most likely diagnosis?

Synovial chondromatosis. ***Synovial chondromatosis*** - This condition is characterized by **multiple cartilaginous nodules** within the synovial space, which typically appear as **multiple radiopaque, loose bodies** (calcified or ossified) on imaging. - It is a **metaplastic process** where synovial cells differentiate into chondrocytes, leading to the formation of these characteristic intra-articular bodies. *Pseudogout* - Caused by the deposition of **calcium pyrophosphate dihydrate (CPD)** crystals, primarily appearing as linear **chondrocalcinosis** within articular cartilage. - Usually presents as an **acute inflammatory monoarthritis** rather than the numerous distinct, loose ossified bodies seen in synovial chondromatosis. *Osteochondritis dissecans* - Typically presents as a **focal subchondral bone necrosis** usually involving the lateral aspect of the medial femoral condyle. - Often results in a **single loose body** or a crater defect, unlike the multiple, widespread nodules seen in synovial chondromatosis. *Tumoral calcinosis* - Manifests as **large, periarticular calcified masses** found in soft tissues outside the joint capsule. - It does not present as multiple small loose bodies floating within the synovial space, but rather as distinct **calcified deposits** in juxta-articular regions.

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Septic Arthritis

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Osteomyelitis

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Tuberculosis of Bones and Joints

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Fungal and Parasitic Infections

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Prosthetic Joint Infections

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Reactive Arthritis

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Management of Joint Infections

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Prevention of Orthopaedic Infections

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Biofilms in Orthopaedic Infections

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Antibiotic Prophylaxis

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Implant-Related Infections

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