Cancer Antigen (CA) 15-3

Test ID: 

704769

CPT code:

86300

Synonyms:

CA 15-3

Clinical Use:

Quantitative measurement of cancer antigen 15-3

Additional Test Information:

Values obtained with different assay methods should not be used interchangeably in serial testing. It is recommended that only one assay method be used consistently to monitor each patient’s course of therapy. This procedure does not provide serial monitoring; it is intended for one-time use only. If serial monitoring is required, please use the serial monitoring number 483404 to order. This test may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (also termed as vitamin B7 or B8, vitamin H, or coenzyme R). It is recommended to ask all patients who may be indicated for this test about biotin supplementation. Patients should be cautioned to stop biotin consumption at least 72 hours prior to the collection of a sample.

Specimen Type:

Serum

Requested Volume: 

0.8 mL

Minimum Volume: 

0.3 mL (Note: This volume does not allow for repeat testing.)

Container Type: 

Red-top tube or gel-barrier tube

Collection:

If a red-top tube is used, transfer separated serum to a plastic transport tube.

Storage Instructions:

Refrigerate
Stability Requirements
Temperature Period

Room temperature 14 days

Refrigerated 14 days

Frozen 14 days

Freeze/thaw cycles Stable x3

Rejection Criteria

Citrate plasma specimen; improper labeling