The penumbra sign in subacute osteomyelitis.
review · Level V
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- Record sourced from PubMed, PMID 15300398.
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Abstract
The penumbra sign is a characteristic magnetic resonance (MR) feature of subacute osteomyelitis. It can be identified on unenhanced T1-weighted spin echo images as a discrete peripheral zone of marginally higher signal intensity than the central bony abscess cavity and the surrounding lower signal intensity of the reactive new bone and oedema.
Medical subject headings
- Magnetic Resonance Imaging
- Osteomyelitis