Fibrous dysplasia

Description: Diagnostic Radiology/Musculoskeletal Imaging/Tumors Basic/Fibrous dyplasia From Wikibooks, the open-content textbooks collection Fibrous dysplasia is a benign, developmental anomaly of the bone-forming mesenchyme in which the medullary cavity is replaced with fibrous material, woven bone, and spindle cells. Virtually any bone in the body can be affected. It is a nonhereditary disorder of unknown cause. Fibrous dysplasia does not spread or proliferate, and malignant transformation is rare (0.5%).