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Acute Polioencephalomalacia, Cerebral Cortex, Cross-Sectional View, Cow.
Gyri are yellow and swollen (arrows). The cause of this yellow color is unknown but has been shown experimentally not to be caused by ceroid-lipofuscin pigments. Changes involving the sulci and gyri in acute polioencephalomalacia are shown in Figure 14-93.
(Courtesy Dr. L. Roth, College of Veterinary Medicine, Cornell University.)
