GO publishes new study showing positive performance of Vermillion test Gynecologic Oncology has published the second prospective clinical study of OVA1 which demonstrated the positive performance of the multi-biomarker test in the triage of early-stage ovarian cancer. Vermillion, the molecular diagnostics company which developed and currently markets the test, had reported positive top-line results of the study in July. Referred to as "OVA500," the study confirms and extends the findings of the first OVA1 pivotal study published last year in Obstetrics & Gynecology by Dr. Fred Ueland of the University of Kentucky. The multi-center study investigated OVA1 performance in the pre-surgical detection of malignancy among 494 women prospectively enrolled from non-gynecologic oncology practices. Sensitivity across all types of ovarian cancers was 96% when OVA1 was added to routine clinical assessment, and this result was nearly identical to the first pivotal study. Importantly, within the test group OVA1 identified 83% of cancers missed by clinical assessment and 71% of cancers missed by CA125.