On MRI imaging of Charcot arthropathy with infection, which finding is commonly observed?

• A. Joint erosions
• B. Bone fracture
• C. Tendinous tear
• D. Calcification of cartilage

Answer: (A)

Charcot arthropathy arises from neuropathic joint destruction, where repetitive microtrauma leads to progressive erosion of the joint surfaces. On MRI, the most characteristic finding is erosive destruction of the articular margins, often with adjacent bone marrow edema and joint effusion, reflecting both the joint damage and the inflammatory/infectious milieu. When infection is present, you may also see surrounding soft tissue edema and signs of osteomyelitis, but the dominant feature is the erosive joint destruction.

Other options don’t fit as well: a fracture can occur but does not define Charcot with infection as reliably as erosions do; tendinous tears describe tendon pathology rather than joint destruction; calcification of cartilage is not typical for Charcot arthropathy.