Abstract
In acute pyelonephritis in the parenchymal phase of IV enhancement, fan- or wedge-like, striated, or patchy zones of low attenuation may be found forming the “fan” sign (↑), “wedge-shaped or striated enhancement”, or “patchy nephrogram” (∆).
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In acute pyelonephritis in the parenchymal phase of IV enhancement, fan- or wedge-like, striated, or patchy zones of low attenuation may be found forming the “fan” sign (↑), “wedge-shaped or striated enhancement”, or “patchy nephrogram” (∆). These areas correspond to necrosis and edema. In the delayed phase of enhancement, the zones of previously low density can slightly enhance. Similar changes in the kidneys occur in embolism, vasculitis, atherosclerosis, and trauma. Thus, clinical correlation is necessary for differentiation of these pathologic conditions.
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© 2014 Springer International Publishing Switzerland
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Yudin, A. (2014). Fan Sign, Wedge-Shaped or Striated Enhancement, and Patchy Nephrogram. In: Metaphorical Signs in Computed Tomography of Chest and Abdomen. Springer, Cham. https://doi.org/10.1007/978-3-319-04013-4_67
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DOI: https://doi.org/10.1007/978-3-319-04013-4_67
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Publisher Name: Springer, Cham
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Online ISBN: 978-3-319-04013-4
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