Periosteal Reaction
Bone formation response visible on imaging that occurs when the periosteum is irritated or inflamed.
Full Definition
Periosteal reaction refers to new bone formation that occurs when the periosteum (outer bone membrane) responds to various stimuli including trauma, infection, tumor, or metabolic stress. This reaction appears on radiographs as new bone formation along the cortical surface and can take various patterns such as solid, laminated, or spiculated appearance. In orthopedic rehabilitation, recognizing periosteal reaction is important as it may indicate ongoing pathology, healing processes, or complications that could affect treatment progression and exercise prescription.
Usage
Usage note: Different from callus formation which is specific to fracture healing; periosteal reaction has broader causes.
In Context
- "Follow-up radiographs showed decreased periosteal reaction indicating resolution of the stress injury." — sports medicine follow-up
- "The aggressive periosteal reaction raised concern for possible infection rather than simple trauma." — differential diagnosis discussion