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Genetic Labs

Houston, Texas

Genetic Laboratory
Baylor Miraca Genetics Laboratories
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Medical Genetics Test Details

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Chromosomal Microarray Analysis - POC (for paraffin-embedded tissue only)
Test Information: The 180K CGH+SNP array is designed for detecting copy number variations in product of conception (POC) when only paraffin-embedded samples are available (also known as rescue karyotyping). This array contains both oligo probes that detect copy number variations (CNVs) and SNP probes that detect absence of heterozygosity (AOH) and segmental or whole chromosome uniparental isodisomy. The average resolution of the array is 10 to 20 Kb. This test can be used to detect CNVs and AOH in POC samples*.

This test has been validated in our laboratory on many POC samples with known clinically relevant CNVs detected by chromosome analysis, FISH, and/or other chromosome microarray platforms. The array is designed to detect losses and gains representing deletions, duplications or amplifications of POC genome. This assay will not detect low level mosaicism, balanced translocations, inversions, or point mutations that may be responsible for the clinical phenotype.

* AOH less than 10 Mb in size will not be reported. This array cannot reliably detect AOH on FFPE samples if the DNA quality or quantity is below our laboratory standards.
Test Details
Test Code: 9506
Technical Information
Methodology: Chromosomal Microarray Analysis
Sample & Shipping Information
Test Requisition: Cytogenetics
Specimen Type: FFPE - Fetal Tissue
Requirements: Paraffin-embedded, formalin-fixed tissue block containing adequate amounts of fetal tissue. Please include a copy of corresponding surgical pathology report.

Transport Temperature: sent at ambient temperature (18-25C/64-77F). Protect paraffin tissue from excessive heat. Ship in cooled container during summer months.

Unacceptable Conditions: No tumor in tissue. Frozen specimens and specimens fixed/processed in alternative fixatives. Blocks older than 3 years will not be accepted.

Stability: Ambient: Indefinitely; Refrigerated: Acceptable.
Shipping Conditions: Ship at ambient temperature (18-25C/64-77F) in an insulated container by overnight courier. Do not heat or freeze.


Specimen Type: FFPE - Slide(s)
Requirements: 10 unstained 10um FFPE slides containing adequate amounts of fetal tissue and a 4-5 um HE stained slide with areas of fetal tissue marked. Please include a copy of corresponding surgical pathology report.

Transport Temperature: sent at ambient temperature (18-25C/64-77F). Protect paraffin tissue from excessive heat. Ship in cooled container during summer months.

Unacceptable Conditions: No tumor in tissue. Frozen specimens and specimens fixed/processed in alternative fixatives.

Stability: Ambient: Indefinitely; Refrigerated: Acceptable.
Shipping Conditions: Ship at ambient temperature (18-25C/64-77F) in an insulated container by overnight courier. Do not heat or freeze.


Turn Around Time: 10-14 days
Billing Information
List Price: *For Insurance or Institutional Prices, please call.
CPT Codes: 81229 x 1


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