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I. Biostatistical-Genetic Aspects and Their Limitations as Derived From a Familial Breast Cancer Resource

Henry T. Lynch, MD; Randall E. Harris, PhD; Claude H. Organ, Jr, MD; Jane F. Lynch, RN

Arch Surg. 1978;113(9):1053-1058.

Abstract
• Practical guidelines are given to promote decision-making logic by the physician in managing patients seeking consultation (consultands) because they may be at high familial risk for breast cancer and associated malignant neoplasms. The protocol is designed to aid in the assessment of patients who may become candidates for intensified cancer surveillance and/or prophylactic surgery.

A resource comprised of 90 extended breast cancer-prone pedigrees provides the basis for these specific recommendations. The resource shows marked tumor heterogeneity among pedigrees, an approximate 50% incidence of breast cancer and associated malignancies among offspring of affected parents, and threefold higher risk for development of mammary carcinoma in the opposite breast of familial patients with unilateral disease than in sporadic patients. In utilizing this protocol, it is crucial that family history be highly accurate from the standpoint of genealogic relationships and pathologic tumor verification so that management recommendations may reflect sound risk-factor assessment. Interpretation of familial risk factors should ideally be made by an informed medical-geneticist. All members of the medical team should then be appraised of familial risk and collectively engage in decision making with the consultand. We believe that this approach can foster more effective control of familial breast cancer.

(Arch Surg 113:1053-1058, 1978)

Author Affiliations
From the Departments of Preventive Medicine/Public Health and Surgery, Creighton University School of Medicine, Omaha.

Footnotes
Accepted for publication April 27, 1978.

Reprint requests to Department of Preventive Medicine/Public Health, Creighton University School of Medicine, 2500 California St, Omaha, NE 68178 (Dr Lynch).

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