Analysis of N-Ethyl-N-nitrosourea-Induced Brain Carcinogenesis by Sequential Culturing During the Latent Period. II. Morphology of the Tumors Induced by Cell Cultures

Pregnant BD IX rats were given ip injections of N-ethyl-N-nitrosourea (ENU) or buffer on day 15 or 16 of gestation, and cultures were prepared from the brains of fetuses and offspring at different times after treatment. Cultured cells were injected sc into syngeneic rats. Some of the cultures derive...

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