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A Nephroblastoma in a Fire-bellied Newt, Cynops pyrrhogaster¹

Department for Exotic Animals, Veterinary Faculty, Biltstraat 172, Utrecht, The Netherlands

A large intraabdominal tumor, consisting of renal blastomatous cells, early defective stages of glomerules, and undifferentiated tubular structures is described in a fully grown female fire-bellied newt (Cynops pyrrhogaster). Questions of nomenclature of renal embryonal tumors in lower vertebrates are briefly discussed. The tumor is designated a nephroblastoma.

¹ Formerly known as Triturus pyrrhogaster.

Received 4/ 7/70. Accepted 7/21/70.