Within 30 days prior to, or on the day of the pelvic mass evaluation procedure, collect up to 35mL of whole blood into one 5mL SST tube, which must be drawn first, followed by three separate 10mL EDTA tubes. Serum from SST tube will be used for protein biomarker testing. Blood from EDTA tubes will be pooled and processed on the Parsortix™ System to capture and harvest rare cells. The captured rare cells will be eluted (harvested) and lysed, and total RNA will be extracted from the cell lysate for evaluation of multiple gene targets.