|LETTER TO EDITOR
|Year : 2020 | Volume
| Issue : 1 | Page : 9-10
Magnetic resonance imaging findings in case of Huntington's disease
Paramdeep Singh1, Rupinderjeet Kaur2
1 Department of Radiology, Guru Gobind Singh Medical College and Hospital, Baba Farid University of Health Sciences, Faridkot, Punjab, India
2 Department of Medicine, Guru Gobind Singh Medical College and Hospital, Baba Farid University of Health Sciences, Faridkot, Punjab, India
|Date of Web Publication||4-Feb-2020|
Dr. Paramdeep Singh
Department of Radiology, Guru Gobind Singh Medical College and Hospital, Baba Farid University of Health Sciences, Faridkot, Punjab
Source of Support: None, Conflict of Interest: None
|How to cite this article:|
Singh P, Kaur R. Magnetic resonance imaging findings in case of Huntington's disease. J Clin Sci 2020;17:9-10
A 32-year-old male with a family history of Huntington's chorea presented with progressive symptoms of gait imbalance, dementia, and involuntary movements for the last 3 years. Clinical diagnosis of Huntington's disease was made, and subsequently, the genetic testing was done which showed trinucleotide repeats and hence was positive for this disease. Magnetic resonance imaging (MRI) of the brain revealed atrophy of the bilateral caudate nuclei and putamen along with the hyperintense signal on T2-weighted [Figure 1] and FLAIR images [Figure 2]. There was also associated enlargement of the front horns (FHs) of the bilateral lateral ventricles with a “box-like configuration” due to atrophy of caudate nuclei. There was also associated diffuse cerebral and cerebellar atrophy on the MRI scan. The intercaudate (IC) distance, FH width, and inner table (IT) width were 2.2, 3.3, and 10.8, respectively. Therefore, the ratios of FH width to IC distance (FH/IC ratio) and IC distance to IT width (IC/IT ratio) were 1.5 (normal value = 2.2–2.6) and 0.20 (normal value = 0.09–0.12), respectively, [Figure 3].
|Figure 1: Axial T2-weighted image showing atrophy with hyperintense signal involving bilateral caudate nuclei and putamen|
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|Figure 2: Axial FLAIR image showing atrophy with hyperintense signal involving bilateral caudate nuclei and putamen|
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|Figure 3: Axial image showing measurement of intercaudate (A and B), inner table (C and D), and frontal horn (E and F) distances in patients with Huntington's disease|
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Huntington's disease is an autosomal dominant hereditary disorder, with loss of GABAergic neurons in the basal ganglia, especially the caudate nuclei and putamen, which are eventually atrophied. The patients usually present with chorea, dementia, and psychosis, which are progressive, with trinucleotide repeats on genetic testing confirming the diagnosis., MRI is a useful investigation to look for associated brain changes. The most prominent features comprise the atrophy of the caudate nuclei that can be quantified using the FH/IC ratio and IC/IT ratio. FH/IC ratio is calculated in the axial plane by dividing the distance between the caudate heads (where they are nearest) and the lateral borders of the FH while IC/IT ratio is calculated by dividing the IC distance with the distance between the IT of the skull bones at the same level. As the caudate nuclei progressively atrophy, the FH/IC ratio increases and IC/IT ratio decreases., Therefore, neuroimaging, especially MRI, may act as a biomarker to assess the progression of this disease.
Declaration of patient consent
The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.
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Conflicts of interest
There are no conflicts of interest.
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[Figure 1], [Figure 2], [Figure 3]