Effects of Prepubertal Ovariectomy on Survival and Specific Diseases in Female RFM Mice Given 300 R of X Rays

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Abstract
RFMf/Wg mice ovariectomized at 3-4 wk of age had overall survival rates no different from those of intact controls. When 2 groups were ovariectomized at 3-4 wk and irradiated (300 R) at 5-6 wk, no difference could be observed as a function of ovariectomy; but there was a highly significant effect of irradiation. While the effect of ovariectomy alone or in combination with radiation had little effect on overall mortality rate, significant effects (positive and negative) were observed on specific spontaneous and radiogenic diseases. Ovariectomy apparently reduced the incidence of nonthymic lymphosarcoma and pituitary adenoma, and increased the incidence of pulmonary adenoma. There was also a suggestion of increased risk of Harderian adenoma and adrenocortical adenoma in the ovariectomized groups. Ovariectomy interacted significantly with radiation in 2 instances, nullifying the effect of radiation on the incidence of septic metritis and severe glomerulosclerosis.