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The Factor V Leiden Mutation and the Risk of Venous Thromboembolism in Gynecologic Oncology Patients

From the Grace Hill Neighborhood Health Centers Inc., St. Louis, Missouri; University of Louisville, Louisville, Kentucky; and Magee-Womens Hospital, Pittsburgh, Pennsylvania.

Address reprint requests to: Amy J. Ravin, MD, Grace Hill Neighborhood Health Centers, Inc., 7127 Cambridge Avenue, St. Louis, MO 63130; E-mail: amyr{at}gracehill.org.

OBJECTIVE: To measure the strength of the association between the factor V Leiden mutation and venous thromboembolism in gynecologic oncology patients.

METHODS: We conducted a case-control study of gynecologic cancer patients in a referral center who were group matched for demographics, tumor type, and treatment. The prevalence of the factor V Leiden mutation was determined in both cases and controls, and an odds ratio was calculated. The factor V Leiden mutation was detected using polymerase chain reaction amplification and nucleic acid restriction digest of deoxyribonucleic acid extracted from leukocytes.

RESULTS: Seventy-five patients were enrolled in the study. Seventy-four samples were available for analysis. There were no differences between the cases and controls with respect to age, race, body mass index, smoking, cancer type, high stage (III or IV) of cancer, or treatment modality. The odds ratio for having the factor V Leiden mutation in patients with venous thromboembolism was 0.3 (95% confidence interval 0.1, 1.7).

CONCLUSION: This study suggests that the factor V Leiden mutation is not associated with an increased risk of venous thromboembolism in gynecologic oncology patients. This contrasts with other studies showing a strong association between the factor V Leiden mutation and venous thromboembolism in cases of previously unexplained venous thromboembolism, and venous thromboembolism associated with other hypercoagulable states, such as pregnancy and oral contraceptive use. The risk of venous thromboembolism due to cancer outweighs the contribution of the factor V Leiden mutation.

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