| Abstract: | Clinical and pathological findings of subcutaneous nodules in the breast regions of 2 untreated control intact female Rhesus monkeys in a long-term study of an oral contraceptive steroid are described. 1 nodule, which was excised early in the study, showed changes characteristic of nodular mammary hyperplasia; no features of neoplasia were present. Some of the nodules were transient. None of the nodules showed a progressive growth pattern during repeated clinical examination over 17-20 months. |
