Chromosomal Microarray (CMA) 750K High Resolution Test
Short Name: CMA 750K High Res Test
Also known as: CMA Test, Chromosomal Microarray Analysis, SNP Microarray Test
Chromosomal Microarray (CMA) 750K High Resolution Test test available at DNA Labs India for ₹18,000. Uses Affymetrix CytoScan 750K Microarray on Blood or Saliva samples. Results in Reports are typically available within 15 days after sample receipt.. Free home collection in 300+ cities across India.
🩺 Medically Reviewed By
Dr SULOCHANA HEMCHANDRA HOLLA
Consultant Medical Geneticist · Reg: 8532
Last reviewed: September 7, 2026
Overview
The purpose of the Chromosomal Microarray (CMA) 750K High Resolution Test is to identify genetic causes behind clinical symptoms such as developmental delays, intellectual disabilities, autism, and congenital anomalies. It aids in diagnosing chromosomal abnormalities that may not be detected by standard methods, enabling personalized medical management, recurrence risk assessment, and informed family planning.
- Test Code
- 301
- Price
- ₹18,000
- Sample Type
- Blood or Saliva
- Result Time
- Reports are typically available within 15 days after sample receipt.
- Fasting Required
- No
- Method
- Affymetrix CytoScan 750K Microarray
Sample Collection
Complete and sign the Genomic Microarray Requisition Form (Form 19). Ensure sample is collected in a sterile environment.
Method: Venipuncture or non-invasive saliva collection
Laboratory Analysis
For blood: a healthcare professional will draw blood via venipuncture. For saliva: provide sample into the collection kit following instructions.
Report Delivery
Label the sample correctly and store as per guidelines. Transport to the lab within the specified stability period.
Timeline: Reports are typically available within 15 days after sample receipt.
Patient Instructions
About This Test
Who Should Get This Test
The purpose of the Chromosomal Microarray (CMA) 750K High Resolution Test is to identify genetic causes behind clinical symptoms such as developmental delays, intellectual disabilities, autism, and congenital anomalies. It aids in diagnosing chromosomal abnormalities that may not be detected by standard methods, enabling personalized medical management, recurrence risk assessment, and informed family planning.
How to Prepare
- Fill the mandatory requisition form
- Avoid eating or drinking 30 minutes before saliva collection
- Blood collection: no fasting required
- Ensure sample is not contaminated
- Ship sample to lab promptly
Doctor's Notes
Reviewed by Dr SULOCHANA HEMCHANDRA HOLLA — MBBS, MD (Medical Genetics) · Reg. No. 8532
"This high-resolution CMA test is vital for early diagnosis in children with developmental issues and couples with recurrent pregnancy loss, enabling targeted interventions and genetic counseling."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Sample without proper documentation
- Hemolyzed or clotted blood sample
- Incorrect sample type or container
- Sample exceeding stability limits
Understanding Your Results
Normal
No significant chromosomal abnormalities detected, but clinical correlation is advised.
Pathogenic CNV
Deletion or duplication identified that is known to cause genetic disorders, requiring further evaluation.
Variant of Uncertain Significance (VUS)
Abnormality found but clinical significance is unclear; follow-up recommended.
Likely Pathogenic
Abnormality suggestive of a genetic condition, supporting diagnosis.
Consult a geneticist or referring specialist upon receiving abnormal or uncertain results for comprehensive counseling and management.
Limitations
- ⚠Cannot detect balanced translocations or single-gene mutations
- ⚠May not identify all types of mosaicism
- ⚠Results require interpretation by a genetic specialist
- ⚠False positives/negatives possible in rare cases
Risks & Considerations
- ●Minimal risks from blood draw: bruising, infection
- ●No significant risks from saliva collection
- ●Psychological impact of results; counseling recommended
Interfering Factors
- ●Contaminated or degraded DNA sample
- ●Insufficient sample volume
- ●Hemolyzed blood sample
- ●Improper storage or transport conditions
Compare With Similar Tests
| Test | Chromosomal Microarray (CMA) 750K High Resolution Test | Karyotyping | FISH Test | Whole Exome Sequencing | Standard Microarray |
|---|---|---|---|---|---|
| Comparison | Chromosomal Microarray (CMA) 750K High Resolution Test | CMA has higher resolution and detects smaller CNVs, but karyotyping can identify balanced translocations. | CMA is genome-wide, while FISH targets specific regions; CMA is more comprehensive. | CMA focuses on CNVs, whereas WES detects single-nucleotide variants; complementary tests. | 750K offers higher density and resolution than lower-arrays, improving detection rates. |
Frequently Asked Questions
What is the Chromosomal Microarray (CMA) 750K test?
How is the CMA 750K test performed?
What conditions does the CMA 750K test diagnose?
Is the CMA 750K test painful?
How long does it take to get results?
Can the test be done during pregnancy?
What if the test shows a Variant of Uncertain Significance (VUS)?
Is home sample collection available for this test?
Does insurance cover the CMA 750K test?
How accurate is the CMA 750K test?
What is the difference between CMA and karyotyping?
Who should consider getting the CMA 750K test?
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