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This is an MRI of the brain in a two-and-a-half

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year-old child with developmental delay.

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On the T2-weighted image,

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we're seeing the sulcation pattern.

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We're seeing more Gyri than in some of the more

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recent cases, but it's still not normal.

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sulcation pattern.

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We're seeing paucity of sulcation.

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And on this sagittal T1-weighted image,

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we can also see.

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While we see Gyri throughout

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both cerebral hemispheres,

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anterior and posterior,

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it's still not the same degree of sulcation

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like we normally see.

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Now, the one thing also that we can see well

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on the T1-weighted image

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is we see the nice gray matter.

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And beneath that,

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we see the white matter.

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There's no band-type heterotopia.

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So, this is a diffuse mild

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lissencephaly spectrum disorder,

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involving both cerebral hemispheres,

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anterior and posteriorly,

1:01

without band-type heterotopia.