Prader-Willi Syndrome (Karyotyping + FISH) Test
Short Name: PWS Karyotyping + FISH
Also known as: PWS Genetic Test, Chromosome 15 Analysis
Prader-Willi Syndrome (Karyotyping + FISH) Test test available at DNA Labs India for ₹8,250. Uses Cell Culture, FISH on Peripheral blood samples. Results in 7-10 days. Free home collection in 300+ cities across India.
🩺 Medically Reviewed By
Dr SHAILAJA RAGHUNATH MURDESHWAR
Consultant Physician · Reg: 8052
Last reviewed: September 7, 2026
Overview
The purpose of this test is to diagnose Prader-Willi Syndrome by detecting genetic abnormalities on chromosome 15, such as deletions or uniparental disomy, using karyotyping and FISH methods.
- Test Code
- 3160
- Price
- ₹8,250
- Sample Type
- Peripheral blood
- Result Time
- 7-10 days
- Fasting Required
- No
- Method
- Cell Culture, FISH
Sample Collection
A doctor's prescription is required, except for surgery, pregnancy cases, or individuals planning to travel abroad.
Method: Venipuncture
Laboratory Analysis
A small blood sample is collected via venipuncture from a vein in the arm.
Report Delivery
Apply pressure to the puncture site to stop bleeding; no special care is typically needed.
Timeline: 7-10 days
Patient Instructions
About This Test
Who Should Get This Test
The purpose of this test is to diagnose Prader-Willi Syndrome by detecting genetic abnormalities on chromosome 15, such as deletions or uniparental disomy, using karyotyping and FISH methods.
How to Prepare
- Ensure a valid doctor's prescription
- Avoid strenuous activity before collection
- Inform the technician of any medical conditions
Doctor's Notes
Reviewed by Dr SHAILAJA RAGHUNATH MURDESHWAR — MBBS, MD (General Medicine) · Reg. No. 8052
"Early diagnosis through genetic testing is key to managing Prader-Willi Syndrome effectively and improving patient outcomes."
Last medically reviewed: September 7, 2026
Test Parameters & Specifications
Sample Stability
- Hemolyzed sample
- Insufficient sample volume
- Contaminated sample
Understanding Your Results
No deletion detected
Normal; no evidence of PWS genetic abnormality
Deletion of 15q11-q13 region detected
Positive for Prader-Willi Syndrome; clinical correlation recommended
If symptoms of Prader-Willi Syndrome are present or if test results are abnormal, consult a geneticist or pediatrician for further evaluation and management.
Limitations
- ⚠May not detect all genetic variants
- ⚠Confirmatory testing may be required
- ⚠Results depend on sample integrity
Risks & Considerations
- ●Minor bruising at puncture site
- ●Rare risk of infection
- ●Fainting in some individuals
Interfering Factors
- ●Sample contamination
- ●Poor sample quality
- ●Technical errors in cell culture
Frequently Asked Questions
What is Prader-Willi Syndrome?
What does the Karyotyping + FISH test involve?
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Is home sample collection available?
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Do I need a doctor's prescription for this test?
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Can this test be done during pregnancy?
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