Aortic Body Tumor in a Cow

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  • 牛の大動脈小体腫瘍の1例
  • ウシ ノ ダイドウミャク ショウタイ シュヨウ ノ 1レイ

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Abstract

Aortic body tumor was found in a 7-year-old Holstein cow with no clinical signs. A neoplastic mass was located at the base of the heart and covered with a fibrous capsule. It was 20×15×7 cm in size and brownish white in color. Metastatic lesions were observed in the premediastinal lymph node. Histologically, the tumor was composed of spindle-shaped and polyhedral cells. The tumor cells were subdivided into irregular lobules by connective tissue septa. Their cytoplasm was slightly eosinophilic and their nuclei were round to oval in shape. Electoron microscopy revealed that the tumor cells contained membrane-limited granules.

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