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RET Oncology FISH

CPT: Contact CPT coding department at 800-222-7566, ext 6-8400.
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  • Adenocarcinoma
  • Non−Small-cell Lung Cancer

Expected Turnaround Time

4 - 7 days

Specimen Requirements


FNA; formalin-fixed paraffin-embedded blocks are acceptable.


Five slides (4- to 5-micron thick sections)

Minimum Volume

Two slides (4- to 5-micron thick sections)


Paraffin block

Storage Instructions

Maintain specimen at room temperature.

Causes for Rejection

Broken or dirty slides; excessive cellular debris or stained slides; decalcified bone cores; absence of tumor or quantity not sufficient for analysis

Test Details


Confirmation/identification of cancer-related alterations in non−small-cell lung cancer


This test was developed, and its performance characteristics determined, by LabCorp. It has not been cleared or approved by the US Food and Drug Administration (FDA).


Fluorescence in situ hybridization (FISH)


Takeuchi K, Soda M, Togashi Y, et al. RET, ROS1 and ALK fusions in lung cancer. Nat Med. 2012 Feb 12; 18(3):378-381.


Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
510315 RET Oncology FISH 510893 Specimen Type 31208-2
510315 RET Oncology FISH 510894 Cells Counted 62361-1
510315 RET Oncology FISH 510895 Cells Analyzed 62360-3
510315 RET Oncology FISH 510896 FISH Result 48674-6
510315 RET Oncology FISH 510316 Interpretation 62365-2
510315 RET Oncology FISH 510317 Director Review 48672-0

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