Abstract
Florid reactive periostitis is a benign periosteal reaction that rarely occurs in the long bones of the forearm. A 43-year-old woman presented with a case of florid reactive periostitis, which affects the distal ulna and radius. Computed tomography and plain radiography showed smooth, uniformed periosteal reaction along the interosseous margins of the distal ulna and radius, without underlying bony cortical erosion or destruction. Magnetic resonance imaging also revealed diffuse edema and enhancement in the subperiosteal area and the adjacent soft tissues.
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