Johns Hopkins DNA Diagnostic
Laboratory
PLEASE
NOTE: Informed consent from the patient is
required prior to ordering a genetic test. The
DNA Diagnostic Lab's consent is located on the
second page of the requisition
form. There is also a patient brochure,
"Things
Every Patient Should Know Before Consenting to a
Genetic Test", available for
download.
See our 5T/TG FAQ page, our CF testing brochure and 5T fact card for additional
information about T/TG testing another CF-related
tests available through the DNA Diagnostic Lab.
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Cystic Fibrosis
– T/TG tract Typing
|
| Gene: |
|
CFTR
|
| Test: |
|
Direct
analysis of the CFTR intron 8 for T and TG tract
length
|
CPT Codes:
|
|
83891 x 1
83898 x 1
83904 x 2
83909 x 2
83912 x 1 |
| Sensitivity: |
|
In a study of males with a
CF causing mutation and 5T, the sensitivity and
specificity of this test were determined to be
91% and 78% respectively for non-classic CF or
isolated CBAVD. This test is designed to assess
whether a patient is at an increased or decreased
risk for his/her 5T allele to be penetrant. It is
not able to assign a numerical risk.
|
| Cost: |
|
$302 per individual
|
| Turn
Around Time: |
|
2
to 3 weeks |
| Special
Considerations: |
|
Phenotypic
information is extremely helpful in interpreting
these test results.
|
|
Click
here for Sample Requirements
Click Here for
Requisition and Billing forms
Click here for clinical information on
Cystic Fibrosis.
Go To:
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Tests Forms
Sample Submission