Spontaneous Nephroblastoma with Lung Metastasis in a Rat |
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Authors: | Yuko Ito Kohei Matsushita Takuma Tsuchiya Yukari Kohara Tsuyoshi Yoshikawa Makoto Sato Keisuke Kitaura Satoshi Matsumoto |
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Affiliation: | 1. Department of Toxicology, Drug Safety Research Center, Tokushima Research Institute, Otsuka Pharmaceutical Co., Ltd., 463-10 Kagasuno, Kawauchi-cho, Tokushima 771-0192, Japan |
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Abstract: | This report describes a spontaneous nephroblastoma with lung metastasis in a 10-week-old male Crl:CD(SD) rat. Macroscopically, a white mass in the kidney and two white masses in the lung were observed. Histopathologically, the renal mass was located in the cortex of a kidney, and it caused pressure on the surrounding renal parenchyma. Three components could be distinguished in the tumor: blastemal, epithelial (primitive glomerular/tubular structures) and mesenchymal (neoplastic connective tissues) elements. Immunohistochemically, the tumor cells were positive for Wilms tumor 1 protein (WT1) and vimentin. Metastasis was found in the lung. Thus, the case was diagnosed as a nephroblastoma with lung metastasis. |
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Keywords: | nephroblastoma metastasis immunohistochemistry rat spontaneous |
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