Prader-Willi/Angelman Methylation
Test Mnemonic
PRADER
CPT Codes
- 81331 - QTY (1)
Aliases
- Angelman Syndrome Methylation
Includes
- Angelman and Prader-Willi Synd by MLPA
- AS-PWS Specimen
- AS-PWS Interpretation
Performing Laboratory
ARUP
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 3 mL | Whole blood | ACD A or B (Yellow) | Refrigerated |
Alternate Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 3 mL | Whole blood | EDTA (Lavender) | Refrigerated |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Refrigerated | 1 month |
| Ambient | 1 week |
| Frozen | Unacceptable |
Days Performed
Varies
Turnaround Time
13 - 15 days
Methodology
| Name | Description |
|---|---|
| Methylation-Specific Multiplex Ligation-Dependent Probe Amplification (MS-MLPA) |
Reference Range
Special Info
Counseling and informed consent are recommended for genetic testing. Plasma and serum will be rejected.