Abstract
Conclusions
The transplantation of numerous epidermal papillomas induced by tar or 20-methylcholanthrene has shown them to be due to neoplastic changes of a single kind. Their wide diversity of form and behavior, when situated on the skin, seems referable in the main to differing capabilities of their cells. The great majority of them, indeed perhaps all, are transplantable in series, when favoring sites are provided them.
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