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Article
December 18, 1972

Medical News

JAMA. 1972;222(12):1483-1492. doi:10.1001/jama.1972.03210120003003

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Abstract

New risk factor found for breast cancer  The age at which an estrogen-treated woman bore her first child appears to greatly influence her risk of developing mammary carcinoma, a recent retrospective study has concluded.The study of patients with benign and malignant breast lesions showed that nulliparous women and those who were over 27 years old when their first child was born had a higher incidence of malignant breast lesions than those who bore their first child before age 28.Maurice M. Black, MD, professor of pathology at New York Medical College, reported the study at the International College of Surgeons meeting in San Diego. The work was done in collaboration with Henry Patrick Leis, Jr., MD, clinical professor and chief of the breast service in the Department of Surgery at New York Medical College."Studies which show that those who take oral contraceptives are not at greater risk are true

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