FISH, Williams
Also known as: Williams Syndrome
Use
This test is used to detect microdeletions of chromosome 7q11.23, associated with Williams syndrome, using fluorescence in situ hybridization (FISH).
Special Instructions
Clinical history and reason for referral are required with test order. If ordered without routine G‑band chromosome analysis, a Tissue Culture charge (CPT code: 88230) will be added. If results are not possible, order may be canceled and replaced with a Cytogenetics Communication.
Limitations
Not provided.
Methodology
Chromosomal / Cytogenetics (FISH)
Biomarkers
Result Turnaround Time
7 days
Related Documents
For more information, please review the documents below
Specimen
Whole Blood
Volume
5 mL
Minimum Volume
1 mL
Container
sodium heparin (green-top) tube; sodium heparin (royal blue‑top) or sodium heparin lead‑free (tan‑top) tube
Collection Instructions
3‑5 mL whole blood collected in a sodium heparin tube; clinical history and reason for referral required.
Storage Instructions
Do not freeze; specimen viability decreases during transit.
Other tests from different labs that may be relevant