Days Set Up
Monday - Friday
Analytic Time

14 - 21 days

Soft Order Code

Test Updated:


SCA8 (ATXN8OS) Repeat Expansion Test

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All specimens should be accompanied by a requisition.

Submitting Specimens

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MLabs provides all the supplies necessary for the collection of specimens.

Test FAQ

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Test Overview

Test Methodology

Repeat Expansion Detection by PCR, Southern Blot

Test Usage

Detects CTA/CTG triplet repeat expansions in the SCA8 gene.

Reference Range

Normal: < 50 CTA/CTG trinucleotide repeats.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Specimen Requirements


Collect lavender top (EDTA) whole blood, refrigerate. May be shipped ambient.

Normal Volume
8 mL whole blood
Minimum Volume
6 mL whole blood

Billing Information

CPT Code
Pro Fee Code

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Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.