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Test Code CTCC Circulating Tumor Cells (CTC) for Colorectal Cancer by CellSearch, Blood

Reporting Name

Circulating Tumor Cells, Colorectal

Useful For

Aids in monitoring patients with metastatic colon cancer

Method Name

CellSearch System

Performing Laboratory

Mayo Medical Laboratories in Rochester

Specimen Type

Whole blood

Specimen Required

Specimen must be shipped immediately to ensure processing can be completed within 96 hours of draw. Send specimen Monday through Friday only and not the day before a holiday. Ship specimen overnight in an Ambient Mailer-Critical Specimens Only (Supply T668).


Container/Tube: CellSave tubes only

Specimen Volume: Two 10-mL tubes

Collection Instructions:

1. Use the Circulating Tumor Cell Collection Kit (Supply T630).

2. Draw whole blood in 2 CellSave preservative 10-mL tubes.

    - Draw a minimum of 7.5 mL of whole blood into each tube.

3. Immediately gently invert each tube 8 times.

4. Send specimen on same day of draw.

Additional Information: 

1. Date and time of draw are required.

2. Stabile at 15 to 30° C for 96 hours. Ship specimen ambient. Do not refrigerate or freeze. Protect from extreme temperatures.

3. Tubes cannot be combined; each tube must contain at least 7.5 mL.

Forms: Pathology/Cytology Request Form (Supply T246) in Special Instructions

Specimen Minimum Volume

7.5 mL

Specimen Stability Information

Specimen Type Temperature Time
Whole blood Ambient 4 days

Reference Values

An interpretive report will be provided.

Day(s) and Time(s) Performed

Monday through Friday, Sunday

Test Classification

This test has been cleared or approved by the U.S. Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.

CPT Code Information

86152-Cell enumeration using immunologic selection and identification in fluid specimen (eg, circulating tumor cells in blood)

86153-Cell enumeration using immunologic selection and identification in fluid specimen (eg, circulating tumor cells in blood); physician interpretation and report when required

LOINC Code Information

Result ID Reporting Name LOINC Code
50803 Specimen N/A
50804 Specimen ID N/A
50805 Source 31208-2
50806 Order Date N/A
50807 Reason for Referral 42349-1
50808 Method 49549-9
50809 Result In Process
50810 Interpretation 59465-5
50811 Amendment In Process
50812 Reviewed By N/A
50813 Release Date N/A