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(A). G-banded karyotype (× 1500 magnification) showing 46,XX,del(5)(p15). Arrow indicates the breakpoint on p-arm of chromosome 5. (B). FISH (× 1000 magnification) using telomeric probes (Aquarius) for chromosome 5p (red) and 5q(green). Arrow indicates the absence of FISH signal on 5p confirming the deletion. (C-E). Brain MRI demonstrating complete corpus agenesis of corpus callosum (thick straight arrows in C, D and E), radial arrangement of medial hemispheric sulci, absence of cingulate sulcus, splaying of anterior part of the lateral ventricles (arrowheads in D), colpocephaly (stars pointing to the enlarged occipital horns of the lateral ventricle in E) and high riding third ventricle (a single circle in D) and pontine hypoplasia (a single thin straight arrow in C and inset).
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