Williams syndrome FISH (Fluorescence In Situ Hybridization) is offered for diagnosis of individuals with clinical features of Williams syndrome (intellectual disability, unique personality characteristics, cardiovascular disease, connective tissue abnormalities). The detection rate of FISH analysis for this disorder is approximately 99%.
Whole blood in sodium heparin (green top) tube: minimum 5-10 ml
Shipping: Samples should be received on day of collection. Keep specimens at room temperature.
Turnaround Time: 7-10 days
CPT Codes: 88230, 88271x2, 88274, 88291
Consent Form: Peripheral Blood Chromosomes and FISH Consent [PDF]
Requisition Form: General Test Requisition [PDF]
Related Tests: Prenatal Microdeletion FISH Panel