An adult newt was received with a mass protruding from its left side slightly caudal to the left forelimb. A detailed light microscopic examination of this lesion by many scientists resulted in many different diagnoses. We believe that a diagnosis of mesenchymal cell neoplasm best describes this lesion.


This research was supported by Grant DRG-1042-AT from the Damon Runyon Memorial Fund for Cancer Research and through NIH General Research Grant 5 S01 FR 5350.

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