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. 2017 Feb 17:805–907.e1. doi: 10.1016/B978-0-323-35775-3.00014-X

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Copyright © 2017 Elsevier Inc. All rights reserved.

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Figure 14-86 — Equine Nigropallidal Encephalomalacia, Brain, Transverse Section Through the Midbrain at the Level of the Rostral Colliculi, Horse.

This lesion is caused by yellow star thistle poisoning. Note the symmetrically cavitated (malacia) lesions in the substantia nigra (arrows), resulting from necrosis and phagocytosis by gitter cells.

(Courtesy Dr. L. Lowenstine, School of Veterinary Medicine, University of California-Davis; and Noah's Arkive, College of Veterinary Medicine, The University of Georgia.)