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Updated: Jul 22, 2026
09:36
Changes in Mammary Gland Morphology and Breast Cancer Risk in Rats
Published on: October 17, 2010
Risk factors for breast cancer
T W Mesko1, J N Dunlap, C M Sutherland
1Department of Surgery, Tulane University School of Medicine, New Orleans, LA.
Comprehensive Therapy
|November 1, 1990
Summary
Female gender, age, and reproductive history are key breast cancer risk factors. However, known factors explain only a quarter of cases, highlighting unknown causes for breast cancer development.
Area of Science:
- Oncology
- Epidemiology
- Genetics
Background:
- Breast cancer development is linked to numerous factors, but clear associations are limited.
- Established risk factors include female gender, advanced age, and reproductive/menstrual history, potentially related to estrogen exposure.
- Histological factors like prior breast cancer, proliferative changes with atypia, and other malignancies also increase risk.
Purpose of the Study:
- To review established and potential risk factors for breast cancer development.
- To clarify the strength of association for various risk factors, including lifestyle and genetic components.
- To emphasize the limitations of current knowledge in explaining all breast cancer incidence.
Main Methods:
- Literature review and synthesis of epidemiological and clinical data on breast cancer risk factors.
- Analysis of associations between demographic, reproductive, histological, and environmental factors and breast cancer incidence.
- Evaluation of the contribution of known risk factors to overall breast cancer cases.
Main Results:
- Female sex and increasing age are primary risk factors.
- Menstrual, reproductive history, family history, prior breast cancer, specific histological findings, radiation, exogenous estrogens, diet, and alcohol intake show varying degrees of association.
- Factors like smoking, caffeine, and stress have minimal supporting evidence for association.
- Known risk factors account for only about 25% of breast cancer cases.
Conclusions:
- While known risk factors aid in screening and risk assessment for breast cancer, they do not fully explain its development.
- The underlying mechanisms of breast cancer remain largely unknown.
- Further research is needed to identify the causative factors and mechanisms of breast cancer.
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