JOURNAL ARTICLE
RANDOMIZED CONTROLLED TRIAL

Ovarian cancer screening in the Prostate, Lung, Colorectal and Ovarian (PLCO) cancer screening trial: findings from the initial screen of a randomized trial

Saundra S Buys, Edward Partridge, Mark H Greene, Philip C Prorok, Douglas Reding, Thomas L Riley, Patricia Hartge, Richard M Fagerstrom, Lawrence R Ragard, David Chia, Grant Izmirlian, Mona Fouad, Christine C Johnson, John K Gohagan
American Journal of Obstetrics and Gynecology 2005, 193 (5): 1630-9
16260202

OBJECTIVE: Ovarian cancer screening with transvaginal ultrasound (TVU) and CA-125 was evaluated in the Prostate, Lung, Colorectal and Ovarian (PLCO) Trial.

STUDY DESIGN: This was a randomized controlled trial of screening versus usual care. Baseline screening results are reported.

RESULTS: Of 39,115 women randomized to receive screening, 28,816 received at least 1 test. Abnormal TVU was found in 1338 (4.7%), and abnormal CA-125 in 402 (1.4%). Twenty-nine neoplasms were identified (26 ovarian, 2 fallopian, and 1 primary peritoneal neoplasm). Nine were tumors of low malignant potential and 20 were invasive. The positive predictive value for invasive cancer was 3.7% for an abnormal CA-125, 1.0% for an abnormal TVU, and 23.5% if both tests were abnormal.

CONCLUSION: The effect of screening on ovarian cancer mortality in the PLCO cohort has yet to be evaluated and will require longer follow-up. Screening identified both early- and late-stage neoplasms, and the predictive value of both tests was relatively low.

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