Papillary renal adenoma of distal nephron differentiation in a horse |
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Authors: | Matsuda Kazuya Kousaka Yousuke Nagamine Natsuko Tsunoda Nobuo Taniyama Hiroyuki |
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Institution: | Department of Veterinary Pathology, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido 069-8501, Japan. kmatsuda@rakuno.ac.jp |
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Abstract: | A 20-year-old thoroughbred mare had a mass in the right kidney. The mass was encapsulated with fibrous capsule and composed of variably-sized papillary projections lined by a single layer of flattened to cuboidal neoplastic epithelial cells with no cytological and nuclear atypia. Immunohistochemically, the neoplastic cells were broadly positive for cytokeratin AE1/AE3 and granular staining for alpha-1-antitrypsin was focally detected; this immunohistochemical property was similar to that of the normal distal nephron. From these results, this case was diagnosed as papillary renal adenoma of distal nephron differentiation. |
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