Retrovirus particles in spontaneously occurring and radiation-induced tumors in ddY mice.


Among spontaneously occurring tumors, pulmonary tumor, malignant lymphoma, mammary tumor, and ovarian tumor were the major ones in 232 ddY female mice. The former three tumors appeared significantly earlier and the latter one increased in incidence in 229 mice given 600 R whole or 800 R partial body (tunk) x-irradiation at the age of 10 weeks. Five tumors… (More)


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