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Research ArticleBRAIN

Hyperintensity of the Precentral Gyral Subcortical White Matter and Hypointensity of the Precentral Gyrus on Fluid-Attenuated Inversion Recovery: Variation with Age and Implications for the Diagnosis of Amyotrophic Lateral Sclerosis

S. Ngai, Y.M. Tang, L. Du and S. Stuckey
American Journal of Neuroradiology February 2007, 28 (2) 250-254;
S. Ngai
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Y.M. Tang
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L. Du
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S. Stuckey
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  • Fig 1.
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    Fig 1.

    A, 65-year-old patient. Axial FLAIR. There is subcortical white matter hyperintensity (arrows) that is isointense to the caudate nucleus, classified as “mildly hyperintense” and graded as “1.

    B, Axial FLAIR. Signal intensities at the caudate nucleus and insular cortex in the same patient with grade 1 SWM hyperintensity.

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    Fig 2.

    A, 76-year-old patient. Axial FLAIR. There is subcortical white matter hyperintensity (arrows) which is isointense to the insular cortex, classified as “distinctively hyperintense” and graded as “2.”

    B, Axial FLAIR. Signal intensities at the caudate nucleus and insular cortex in the same patient with grade 2 SWM hyperintensity.

  • Fig 3.
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    Fig 3.

    61-year-old patient. Axial FLAIR. There is absence of subcortical white matter hyperintensity.

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    Fig 4.

    65-year-old patient. Axial FLAIR. There is a hypointense line in the precentral gyrus gray matter (arrows), designated “1.”

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    Fig 5.

    61-year-old patient. Axial FLAIR. There is absence of a hypointense line in the precentral gyrus gray matter, designated “0.”

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    Fig 6.

    Percentage of subjects identified with SWM hyperintensity in different age groups (average of reader A and B).

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    Fig 7.

    Percentage of subjects identified with PGGM hypointensity in different age groups (average of reader A and B).

Tables

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    Table 1:

    SWM hyperintensity in different age groups

    Age (n)Grade 0Grade 1Grade 2
    Reader AReader BReader AReader BReader AReader B
    0–30 years (20)20200000
    31–40 years (20)16194100
    41–50 years (21)20201100
    51–60 years (21)14156610
    61–70 years (20)10139611
    71–80 years (20)56121133
    • Note:—SWM indicates subcortical white matter.

    • View popup
    Table 2:

    Number of subjects identified with PGGM hypointensity in different age groups for readers A and B

    Age (n)Absent SignalHypointensity
    Reader AReader BReader AReader B
    0–30 years (20)202000
    31–40 years (20)191911
    41–50 years (21)181833
    51–60 years (21)151566
    61–70 years (20)141565
    71–80 years (20)891211
    • Note:—PGGM indicates precentral gyrus gray matter.

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American Journal of Neuroradiology: 28 (2)
American Journal of Neuroradiology
Vol. 28, Issue 2
February 2007
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Hyperintensity of the Precentral Gyral Subcortical White Matter and Hypointensity of the Precentral Gyrus on Fluid-Attenuated Inversion Recovery: Variation with Age and Implications for the Diagnosis of Amyotrophic Lateral Sclerosis
S. Ngai, Y.M. Tang, L. Du, S. Stuckey
American Journal of Neuroradiology Feb 2007, 28 (2) 250-254;

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Hyperintensity of the Precentral Gyral Subcortical White Matter and Hypointensity of the Precentral Gyrus on Fluid-Attenuated Inversion Recovery: Variation with Age and Implications for the Diagnosis of Amyotrophic Lateral Sclerosis
S. Ngai, Y.M. Tang, L. Du, S. Stuckey
American Journal of Neuroradiology Feb 2007, 28 (2) 250-254;
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