Circulating Tumor Cell Count / WILL BE DISCONTINUED 5/13/23

Message

Due to the 4 day stability, specimen cannot be collected on Friday, Saturday, or Sunday.

Test Code

93399 (ARUP)

Alias/See Also

Cell Search
Circulating tumor Cells, Breast, Colon, Prostate
CTC

Includes

Circulating Tumor Cell Number
Patient-History - Metastatic Cancer Type
EER Circulating Tumor Cell Count

Preferred Specimen

20 ml whole blood collected in 2 CellSave Preservative tubes (yellow & purple tiger)

Patient Preparation
If the patient is on doxorubicin therapy, allow 1 week following administration of a dose of doxorubicin before blood draw.

Minimum Volume

16 ml whole blood collected in 2 CellSave Preservative tubes (yellow & purple tiger)

Transport Temperature

Room temperature

Specimen Stability

Ambient; 4 days
Refrigerated, Unacceptable
Frozen, Unacceptable

Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)

Specimens not collected in the CellSave tube or collected in expired CellSave tubes.
Short draws.

Methodology
Immunomagnetic
Seperation/Immunofluorescent
Stain/Computer Assisted Analysis

Setup Schedule

Sunday - Saturday

Report Available

1-5 days

Limitations

This assy is FDA approved only for breast, colorectal, or prostate metastatic cancers; other types will not be tested.

Clinical Significance

The CellSearch™ Circulating Tumor Cell kit is intended for the quantification of circulating tumor cells (CTC) of epithelial origin for metastatic breast, colon, or prostate cancer, in whole blood. This assay can be used to predict progression free and overall survival in patients treated for metastatic cancer.

The results of a CellSearch test should be interpreted with caution if specimens are drawn within 7 days of administration of doxorubicin therapy.
May use to predict survival in patients treated for metastatic breast, prostate, and colorectal cancers. May use to evaluate response to therapy.

Performing Laboratory
ARUP
500 Chipeta Way
Salt Lake City, UT 84108

Last Updated: April 4, 2023

The CPT Codes provided in this document are based on AMA guidelines and are for informational purposes only. CPT coding is the sole responsibility of the billing party. Please direct any questions regarding coding to the payor being billed. Any Profile/panel component may be ordered separately. Reflex tests are performed at an additional charge.