TUMOR MARKERS
Other Test Name	:	– Carbohydrate Antigen 125 – Cancer Antigen 125 – CA 125 Tumor Marker
Specimen Requirements	:	Specimen: Serum or Plasma Volume: 1-3 mL Serum or Plasma Container: Red or Gold tube
Storage Instructions	:	Refrigerated: 5 Days Freezer: 24 Weeks
Causes for Rejection	:	– The wrong collection tube was utilized. – Hemolyzed specimen – Significantly lipemic specimen
Stability Requirements	:	Room Temperature: 8 Hours
Use	:	– Helps identify patients who have had first-line therapy for ovarian cancer
Limitation	:	Rarely, interference may arise from extraordinarily high titers of antibodies to streptavidin, ruthenium, or analyte-specific antibodies.