Prader-Willi Syndrome
| Order Code: | PW |
| Order Form: | Molecular Genetics General Consult Requisition |
Specimen:
Whole Blood
Collection Medium:
 |
| Lavender top tube 3 mL (EDTA) |
Minimum:
Adults - 3 mL whole blood in lavender top tube (EDTA)
Children - 2 mL whole blood in lavender top tube (EDTA)
Testing on smaller volumes than those requested will be attempted.
However, in some cases, small blood volumes may compromise the ability
to perform testing.
Testing requires a dedicated collection tube.
Testing
Schedule:
Weekly
Analytic Time:
21 days
Reference Range:
Prader-Willi syndrome - absent paternal 15q12
Methodology:
Southern Blot (Methylation detection)
Sample
Processing:
Do Not Centrifuge.
Label transport tube with two patient identifiers, date and time of collection.
Patient's age and sex is required on requisition for processing.
Relevant clinical information must be submitted with specimen in order to provide correct interpretation of test results.
Submit whole blood in original container.
Label transport tube with two patient identifiers, date and time of collection.
Patient's age and sex is required on requisition for processing.
Relevant clinical information must be submitted with specimen in order to provide correct interpretation of test results.
Submit whole blood in original container.
Sample
Storage:
Room temperature for up to 24 hours, then refrigerate the whole blood if it is necessary to be held overnight, or weekends, or holidays.
Transport
Instructions:
Recommend express mail or equivalent if not on courier service.
Place requisition into outside pocket of bag.
Ship at ambient temperature.
Place requisition into outside pocket of bag.
Ship at ambient temperature.
CPT Code:
83890, 83892, 83894, 83896, 83897, 83912
See also:
Angelman Syndrome, Whole Blood
Angelman Syndrome, Whole Blood
See Additional Information:
Prader-Willi and Angelman Syndrome Information
Prader-Willi and Angelman Syndrome Information