Homonymous Visual Field Loss without Structural Lesion on Magnetic Resonance Imaging: Documented with Positron Emission Tomography and Diffusion Tensor Imaging

Abstract The authors describe a 35-year-old man suffering from homonymous hemianopia after head trauma 4 years before but with negative magnetic resonance imaging (MRI) findings. Brain fluorine-18 fluorodeoxyglucose positron emission tomography (18FDG-PET) showed hypometabolism at the unilateral occ...

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Published inNeuro-ophthalmology (Amsterdam : Aeolus Press. 1980) Vol. 38; no. 4; pp. 238 - 242
Main Authors Yang, Tae-Ho, Oh, Sun-Young, Kwak, Kichang, Lee, Jong-Min
Format Journal Article
LanguageEnglish
Published England Informa Healthcare USA, Inc 01.08.2014
Taylor & Francis
Subjects
Case Report
traumatic brain injury
diffusion tensor imaging
Crossed cerebellar diaschisis
homonymous hemianopia
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Summary:Abstract The authors describe a 35-year-old man suffering from homonymous hemianopia after head trauma 4 years before but with negative magnetic resonance imaging (MRI) findings. Brain fluorine-18 fluorodeoxyglucose positron emission tomography (18FDG-PET) showed hypometabolism at the unilateral occipital lobe and crossed cerebellar hemisphere, and diffusion tensor imaging (DTI) revealed that the ipsilateral optic radiations were completely interrupted. The crossed cerebellar diaschisis (CCD) observed in the chronic stage of brain damage was caused by cerebellar suppression of the cerebral blood flow due to an involvement of the corticopontocerebellar tract. PET and DTI provide objective means for determining the relationship of functional deficits to head trauma, even in cases where the injury was sustained years prior to the evaluation.
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ISSN:0165-8107
1744-506X
DOI:10.3109/01658107.2014.897733