Clinical Case of a Brainstem Tumor in a Holstein Cow

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  • ホルスタイン種乳牛における脳幹部腫瘍の1症例
  • ホルスタインシュ ニュウギュウ ニ オケル ノウカンブ シュヨウ ノ 1 ショウレイ

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Abstract

A 38-month-old Holstein cow showed a progressive neurological symptom, with tilting to the left side. Unilateral compressive lesions from the medulla oblongata to the pons were suspected based on the history, the lack of reactions of the left light reflex and left pinna reflex, and delayed findings in III to V of the left ear in the brainstem auditory evoked potentials. A yellow embrittlement lesion in the left pons was found at necropsy. Although the lesion was a tumor, the exact origin of the tumor could not be determined by histopathological examination using several immunohistochemical techniques.

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