Usher Syndrome Type IF
Use
The Usher syndrome type IF test offers molecular detection of one pathogenic variant in the PCDH15 gene, R245* (c.733C>T), which accounts for greater than 75% of Ashkenazi‑Jewish Usher syndrome type IF pathogenic variants. Usher syndrome type IF is an autosomal recessive condition characterized by profound congenital sensorineural deafness and progressive loss of vision due to retinitis pigmentosa beginning in childhood or adolescence.
Special Instructions
This germline genetic test requires physician attestation that patient consent has been received if ordering medical facility is located in AK, DE, FL, GA, IA, MA, MN, NV, NJ, NY, OR, SD or VT or test is performed in MA.
Limitations
Not provided.
Methodology
PCR-based (PCR)
Biomarkers
Result Turnaround Time
11-16 days
Related Documents
For more information, please review the documents below
Specimen
Whole Blood
Volume
5 mL (4 mL minimum)
Minimum Volume
Not provided
Container
EDTA (lavender‑top) or ACD (yellow‑top) tube
Collection Instructions
Whole blood: Normal phlebotomy procedure. Specimen stability is crucial. Store and ship room temperature immediately. Do not freeze.
Causes for Rejection
Do not accept blood that is clotted, or shipped in damaged containers. Wrong test indication.
