Two Cases of Bovine Malignant Nephroblastoma

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  • 牛にみられた悪性腎芽腫の2例
  • ウシ ニ ミラレタ アクセイ ジンガシュ ノ 2レイ

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Two cases of malignant nephroblastoma were found in 4-and 6-year old Holstein-Friesian cows. Macroscopically, the right kidney was occupied with the tumor in both cases. Metastatic lesions were found in the lung, pericardium, and pleura in one case, and in the liver and omentum in the other case. The tumor cell had an oval or spindle shaped nucleus containing abundant chromatin. In both cases, tubular and proglomerular structures were seen in the cellular parts of original tumors. A few tubular or pseudotubular structures were observed in the metastatic tumors.

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