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The penumbra sign in subacute osteomyelitis

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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.

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Authors and Affiliations

  1. Department of Radiology, NHS Trust, MRI Centre, Royal Orthopaedic Hospital, Birmingham, B31 2AP, UK

    A. M. Davies

  2. Orthopaedic Oncology, Royal Orthopaedic Hospital, Birmingham, UK

    Robert Grimer

Authors
  1. A. M. Davies
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  2. Robert Grimer
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Correspondence to A. M. Davies.

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Davies, A.M., Grimer, R. The penumbra sign in subacute osteomyelitis. Eur Radiol 15, 1268–1270 (2005). https://doi.org/10.1007/s00330-004-2435-9

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  • DOI: https://doi.org/10.1007/s00330-004-2435-9

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