The Teaching Point

Tubular enhancement in a linear or curvilinear pattern – the tunnel sign – is an unusual appearance of brain abscesses. Its presence may be specific for infection by one of three etiologic agents - Burkholderia Pseudomallei, Spirometra Mansoni or Listeria Monocytogenes.






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From the manuscript

The Tunnel Sign Revisited: A Novel Observation of Cerebral Melioidosis Mimicking Sparganosis

Free full text article: The Tunnel Sign Revisited: A Novel Observation of Cerebral Melioidosis Mimicking Sparganosis

Abstract
The tunnel sign has been described as a specific feature of cerebral sparganosis. We present a case of a 55-year-old gentleman found to have cerebral melioidosis and with initial imaging mimicking the appearance of sparganosis. This suggests that the tunnel sign in brain abscesses may be specific for infection by Burkholderia Pseudomallei, Spirometra Mansoni or Listeria Monocytogenes.






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1. Tunnel Sign

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