Veins and arteries vary in size from one patient to another and from one side of the body to the other. Obtaining a blood sample from some people may be more difficult than from others.
Other risks associated with having blood drawn are slight but may include:
Dann RB, et al. Strategies for ovarian cancer prevention. Obstet Gynecol Clin North Am. 2007;34(4):667-686.
Goonewardene TI, et al. Management of asymptomatic patients on follow-up for ovarian cancer with rising CA-125 concentrations. Lancet Oncol. 2007;8(9):813-821.
National Comprehensive Cancer Network. NCCN Practice Guidelines in Oncology: Ovarian cancer. 2009; v2.
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