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HelpTest Code CGSNPO Cytogenomic SNP Array, Products of Conception
Specimen and Container/Tube
Products of conception (Chorionic villi) or other fetal tissues collected in a sterile specimen container w/ transport media (provided by the lab) or sterile saline.
Rejection Criteria
Formalin fixed tissue cannot be processed by the laboratory; Non-pregnancy tissue (at the discretion of the section director or supervisor)
Critical Values
N/A
Turnaround Time
N/A
LOINC Codes
N/A
Volume
Preferred: 100+mg of tissue
Minimum: 40mg of tissue
Specimen Stability
Refrigerate at 4°C and deliver to laboratory within 24 hours of specimen collection.
Last Review Date
12/7/2022
Collection Instructions
Specimen should be collected in a sterile specimen cup with transport media (provided by the lab) or sterile saline. Refrigerate at 4°C and deliver to laboratory within 24 hours of specimen collection.
Additional Information
SNP Array Test Limitations: Will not detect balanced translocations, low level mosaicism, some instances of uiparental disomy, point mutations and small insertion/deletions.
CPT
88235; 81229
Reference Values
Interpretative Report
Clinical Indications
Indication for chromosome analysis with reflex to SNP array testing of products of conception include: pregnancy loss of unknown etiology; fetal anomalies; parental chromosome abnormality; clarification of ambiguous chromosomal findings; detection of chromosome rearrangements; failiure of tissue to grow in culture.
Specimen Handling & Transport Instructions
Refrigerate at 4°C and deliver to laboratory within 24 hours of specimen collection. POC speimen can be tubed to J-601 (Tube station #461)
Test Components
This array includes 2.67 million markers for copy number (CN) analysis including approximately 750,000 SNP probes, and 1.9 million non-polymorphic probes for whole genome coverage.
Methodology
SNP Microarray
Synonyms/Key Search Words
Microarray, SNP, gen hyb, ACGH, Gene, Whole Gene, CGH