Spontaneous nephroblastoma in a Japanese giant salamander (Andrias japonicus)

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Abstract

An adult male Japanese giant salamander (Andrias japonicus) died accidentally, and necropsy showed a white mass (23 × 15 mm) in the left kidney and hepatorrhexis with hemoperitoneum. Histologically, the renal mass was mainly composed of immature nephroblastic tumor cells. In the tumor tissue, a trabecular pattern lined by oval to polygonal tumor cells with a rich interstitium, solid growth and a few tubular structures was observed. Nephroblastic tumor cells were strongly positive for vimentin and weakly positive, and epithelium-like tumor cells were strongly positive for cytokeratin. However, antibody for Wilms' tumor protein 1 did not react with the salamander's cells. On electron microscopy, a desmosome junction was observed between tumor cells. This is the first report of nephroblastoma in a Japanese giant salamander. © 2012 The Japanese Society of Veterinary Science.

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Kawasumi, T., Kudo, T., & Une, Y. (2012, May). Spontaneous nephroblastoma in a Japanese giant salamander (Andrias japonicus). Journal of Veterinary Medical Science. https://doi.org/10.1292/jvms.11-0477

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