Chromogranin A, Serum
Specimen Type Describes the specimen type needed for testing
Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.
Patient Preparation: Proton pump inhibitor drugs should be discontinued for at least 2 weeks before collection.
Preferred: Red top
Acceptable: Serum gel
Submission Container/Tube: Plastic screw-top aliquot tube
Specimen Volume: 0.5 mL
Collection Information: Spin down and remove serum from clot. Do not submit in original tube.
If not ordering electronically, complete, print, and send 1 of the following forms with the specimen:
General Request Form (T239) (http://www.mayomedicallaboratories.com/it-mmfiles/general-request-form.pdf)
Oncology Test Request Form (T729) (http://www.mayomedicallaboratories.com/it-mmfiles/oncology-request-form.pdf)
Specimen Minimum Volume Defines the amount of specimen required to perform an assay once, including instrument and container dead space. Submitting the minimum specimen volume makes it impossible to repeat the test or perform confirmatory or perform reflex testing. In some situations, a minimum specimen volume may result in a QNS (quantity not sufficient) result, requiring a second specimen to be collected.
Mild OK; Gross Reject
Mild OK; Gross OK
Mild OK; Gross OK
Original collection tube: serum not poured off into an aliquot tube
Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperature(s) are also included.