XIST by FISH

Alphabetical Test listing

XIST by FISH-4280F

Test name:

XIST by FISH

Test number:

4280F

Excellian order number:

LAB4280F

Abbreviation:

CYG

Alternate names:

X Inactivation-specific transcript
Xq13.2
X Chromosome inactivation center
XIC

Useful for:

Detects the presence of the XIST gene (Xq13.2)

Specimen type:

Sodium heparin (Na hep) whole blood

Collection container:

Dk green Sodium heparin (Na hep), no gel

Volume:

5.0 mL

Minimum volume:

2.0 mL

Collection instructions:

Only 1 tube is needed if both Chromosome and FISH tests are ordered

Cytogenetics Specimen Collection

Processing instructions:

Submit tube unspun

Test Ordering For Excellian Users:
Order test place holder according to specimen type.
Answer the questions in Excellian to select the test name and complete the test order.

Specimen = Congenital Blood (LAB4280F)

For prenatal diagnosis, please call the lab and discuss with the Cytogenetics lab director.

Transport container:

Dk green Sodium heparin (Na hep), no gel

Alternate specimen type:

Sodium heparin (Na hep) Cord blood

Alternate specimen volume:

2.0 mL (1.0 mL minimum)

Transport and stability:

Ambient - Do not heat or freeze

Performing lab:

AHL - Cytogenetics: X

Days set up:

Mo - Fr

TAT:

14 days

Method:

Fluorescence in situ Hybridization (FISH)

Reference ranges:

An interpretive report will be provided

CPT codes:

88271 x2
88273
88275
88230 - Culture (if appropriate)

Subject to medical necessity (Y/N):

Yes

LCD/NCD:

Medical necessity

Date created:

08/17/2015

Revised date:

09/01/2015