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ReplyLETTER

Reply:

G. Zuccoli
American Journal of Neuroradiology December 2011, 32 (11) E210; DOI: https://doi.org/10.3174/ajnr.A2925
G. Zuccoli
aRadiology DepartmentChildren's Hospital of PittsburghPittsburgh, Pennsylvania
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We thank Borges et al for their interest in our article.1 We agree that fornical involvement represents 1 of the unusual findings in Wernicke encephalopathy (WE).

The involvement of other anatomic substrates of memory like the thalami and the mamillary bodies represent typical MR imaging findings of WE, being present in 80% and 45% of patients, respectively.1 In our article, we did not find involvement of the fornix in any of the 56 patients.1 In our review of the literature (written before our article1), we found only 2 of 53 patients showing fornical involvement.2 WE is an acute neurologic disorder characterized by changes in consciousness, ocular dysfunction, and gait disturbances. The memory deficits are characteristics of Wernicke-Korsakoff syndrome (WKS), which, in most cases, is the inevitable outcome of WE. The fornix projects mainly to the mamillary body and also to the septal region. Thus, the fornix is likely linked, to some extent, to the memory impairment observed in WKS. However, on the basis of the higher incidence of signal-intensity alterations in the thalami and mamillary bodies in patients with WE, we believe that these regions are responsible for most of the memory deficits of WKS.

References

  1. 1.↵
    1. Zuccoli G,
    2. Santa Cruz D,
    3. Bertolini M,
    4. et al
    . MR imaging findings in 56 patients with Wernicke encephalopathy: nonalcoholics may differ from alcoholics. AJNR Am J Neuroradiol 2009;30:171–76
    Abstract/FREE Full Text
  2. 2.↵
    1. Zuccoli G,
    2. Pipitone N
    . Neuroimaging findings in acute Wernicke's encephalopathy: review of the literature. AJR Am J Roentgenol 2009;192:501–08
    CrossRefPubMed
  • © 2011 by American Journal of Neuroradiology
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American Journal of Neuroradiology: 32 (11)
American Journal of Neuroradiology
Vol. 32, Issue 11
1 Dec 2011
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G. Zuccoli
American Journal of Neuroradiology Dec 2011, 32 (11) E210; DOI: 10.3174/ajnr.A2925

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Reply:
G. Zuccoli
American Journal of Neuroradiology Dec 2011, 32 (11) E210; DOI: 10.3174/ajnr.A2925
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