FISH Study – Microdeletion Metaphase – VCF Syndrome (22q11.2)

Additional Information:


CPT Code(s):

88271, 88273, 88291

Collection Procedure:


Specimen Requirements:

Peripheral Blood: Collected aseptically in sodium heparin tubes (usually green top tubes) and immediately rotated thoroughly to prevent clotting. For infants obtain approximately 2 cc and for children and adults obtain 5-7 cc.

Please note: A separate blood sample is required if a concurrent CGH microarray study is desired.

Do not freeze or "fix" samples in any manner contrary to the maintenance of cell viability. Maintain sample sterility, keep all specimens at room temperature, and deliver to the laboratory within 24-48 hours. Ship at room temperature for overnight delivery.

Submit with completed Standard Cytogenetic Analyses Requisition form.





metaphase/chromosome fluorescence in situ hybridization analyses; requires cell culture and concurrent or previous routine karyotyping


10 - 28 days

Reference Values:



Mon - Sat

Interpretation Data: