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Fig. 5. Vascular abnormalities in Hhex/ mice at
E13.5. (A,B) Transverse sections through the neck region of E13.5 embryos show
massive dilation of the internal jugular vein in
Hhex/ embryo compared to wild-type embryo. A
and B are shown at the same magnification. Other examples of abnormal vascular
structures include enlarged intercostal vessels (arrows) (C,D) and massive
vascular lake (arrow) in the region of the septum transversum (F) in place of
normal liver tissue and vascular structures (E). CCA, common carotid artery;
IJV, internal jugular vein; TYR, thyroid; IA, intercostal artery.