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European Radiology
Published in: European Radiology 6/2005

01-06-2005 | Tips and Tricks

The penumbra sign in subacute osteomyelitis

Authors: A. M. Davies, Robert Grimer

Published in: European Radiology | Issue 6/2005

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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.
Literature
1.
Grey AC, Davies AM, Mangham DC, Grimer RJ, Ritchie DA (1998) The penumbra sign on T1-weighted MR imaging in subacute osteomyelitis: frequency, cause and significance. Clin Radiol 53:587–592PubMed
2.
Martí-Bonmatí L, Aparisi F, Poyatos C, Vilar J (1993) Brodie abscess: MR imaging appearance in 10 patients. J Magn Reson Imaging 3:543–546PubMed
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Zimmerman RD, Weingarten K (1991) Neuroimaging of cerebral abscesses. Neuroimaging Clin N Am 1:1–16
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Roberts JM, Drummond DS, Breed AL, Chesney J (1982) Subacute hematogenous osteomyelitis in children: a retrospective study. J Pediatr Orthop 2:249–254PubMed
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Baxter Willis R, Rozencwaig R (1996) Pediatric osteomyelitis masquerading as skeletal neoplasia. Orthop Clin North Am 27:625–634PubMed
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Oudjhane K, Azouz EM (2001) Imaging of osteomyelitis in children. Radiol Clin North Am 39:251–266PubMed
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Guermazi A, Mohr A, Genant HK (2003) Brodie abscess: another type of chronic posttraumatic osteomyelitis. Eur Radiol 13:1750–1752CrossRefPubMed
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Marui T, Yamamoto T, Akisue T, Nakatani T, Hitora T, Nagira K, Yoshiya S, Kurosaka M (2002) Subacute osteomyelitis of long bones: diagnostic usefulness of the penumbra sign on MRI. Clin Imaging 26:314–318CrossRefPubMed
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Williams HJ, Davies AM, Allen G, Evans N, Mangham DC (2004) Imaging features of intraosseous ganglia: a report of 45 cases. Eur Radiol. DOI 10.1007/s00330-004-2371-8CrossRefPubMed
Metadata
Title
The penumbra sign in subacute osteomyelitis
Authors
A. M. Davies
Robert Grimer
Publication date
01-06-2005
Publisher
Springer-Verlag
Published in
European Radiology / Issue 6/2005
Print ISSN: 0938-7994
Electronic ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-004-2435-9

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