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Prenatal Aneuploid Evaluation, Chorionic Villus Sampling, FISH

CPT

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Synonyms
  • Chromosome Analysis, Prenatal FISH, Chorionic Villus Sampling
  • CVS FISH
  • Prenatal FISH
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  • Updated on 04/03/2025

Test Details

Methodology

Fluorescence in situ hybridization (FISH)

Result Turnaround Time

2 - 3 days

Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.

Related Documents

Use

This test is used for fluorescence in situ hybridization (FISH), prenatal chorionic villus sampling, and FISH targeting numerical changes in 13, 18, 21, X and Y.

Special Instructions

Pertinent medical findings should accompany request for FISH. It is required that InSight FISH testing be performed concurrently with prenatal chromosome analysis or microarray. Abnormal results should have banded chromosome confirmation.

Pertinent medical findings should accompany request for FISH. It is recommended that InSight FISH testing be performed concurrently with prenatal chromosome analysis or microarray. Abnormal results should have banded chromosome confirmation.

Pertinent medical findings should accompany request for FISH. It is required that InSight FISH testing be performed concurrently with prenatal chromosome analysis or microarray. Abnormal results should have banded chromosome confirmation.

Limitations

Molecular mutations below the resolution of FISH will not be detected; will not detect aneuploidy that is not targeted by FISH probes in this panel.

This test was developed and its performance characteristics determined by Labcorp. It has not been cleared or approved by the Food and Drug Administration.

Specimen Requirements

Specimen

Chorionic villi

Volume

5 mg chorionic villi or greater

30 mg chorionic villi

5 mg chorionic villi or greater

Minimum Volume

5 mg chorionic villi (Note: Minimum volumes may not allow for repeat testing.)

Container

The CVS transport tube (a sterile specimen container with transport medium) is available from Labcorp. Please call customer service at 800-345-4363.

Storage Instructions

Maintain specimen at room temperature.

Causes for Rejection

No villi submitted in specimen; low volume; wrong specimen type; frozen specimen; specimen placed in fixative

References

Schwartz S. Efficacy and applicability of interphase fluorescence in situ hybridization for prenatal diagnosis. Am J Hum Genet. 1993 May; 52(5):851-853. 8488835
Ward BE, Gersen SL, Carelli MP, et al. Rapid prenatal diagnosis of chromosomal aneuploidies by fluorescence in situ hybridization: Clinical experience with 4500 specimens. Am J Hum Genet. 1993 May; 52(5):854-865.8488836

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
510960 FISH, CVS Prenatal Aneuploid 57317-0 510803 Cells Counted 64089-6
510960 FISH, CVS Prenatal Aneuploid 57317-0 510804 Cells Analyzed 64086-2
510960 FISH, CVS Prenatal Aneuploid 57317-0 510805 Cytogenetic Diagnosis 57318-8
510960 FISH, CVS Prenatal Aneuploid 57317-0 510958 Cytogenetic Interpretation 62365-2
510960 FISH, CVS Prenatal Aneuploid 57317-0 510807 Specimen Type 31208-2
510960 FISH, CVS Prenatal Aneuploid 57317-0 510959 Director Review: 72486-4
510960 FISH, CVS Prenatal Aneuploid 57317-0 512123 PDF 11502-2
Order Code510960
Order Code NameFISH, CVS Prenatal Aneuploid
Order Loinc57317-0
Result Code510803
Result Code NameCells Counted
UofM
Result LOINC64089-6
Order Code510960
Order Code NameFISH, CVS Prenatal Aneuploid
Order Loinc57317-0
Result Code510804
Result Code NameCells Analyzed
UofM
Result LOINC64086-2
Order Code510960
Order Code NameFISH, CVS Prenatal Aneuploid
Order Loinc57317-0
Result Code510805
Result Code NameCytogenetic Diagnosis
UofM
Result LOINC57318-8
Order Code510960
Order Code NameFISH, CVS Prenatal Aneuploid
Order Loinc57317-0
Result Code510958
Result Code NameCytogenetic Interpretation
UofM
Result LOINC62365-2
Order Code510960
Order Code NameFISH, CVS Prenatal Aneuploid
Order Loinc57317-0
Result Code510807
Result Code NameSpecimen Type
UofM
Result LOINC31208-2
Order Code510960
Order Code NameFISH, CVS Prenatal Aneuploid
Order Loinc57317-0
Result Code510959
Result Code NameDirector Review:
UofM
Result LOINC72486-4
Order Code510960
Order Code NameFISH, CVS Prenatal Aneuploid
Order Loinc57317-0
Result Code512123
Result Code NamePDF
UofM
Result LOINC11502-2