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Test ID FSCA3 SCA3 (MJC/ATXN3) Repeat Expansion

Method Name

Repeat Expansion Detection by PCR

Reporting Name


Specimen Type

Whole Blood EDTA

Specimen Required

Specimen Type: Whole Blood

Container/Tube: Lavender top (EDTA)

Specimen volume: 8 mL

Collection Instructions:  Send 8 mL whole blood in original tube ambient

Specimen Minimum Volume

6 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Whole Blood EDTA Ambient (preferred) 10 days
  Refrigerated  10 days

Reference Values

SCA3 CAG Repeat Ranges:

Normal: < = 44

Borderline 45 - 59

Positive > = 60

Day(s) Performed

Monday through Friday

Performing Laboratory

Athena Diagnostics

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
FSCA3 SCA3-MJD (ATXN3) DNA Not Provided


Result ID Test Result Name Result LOINC Value
Z0096 SCA3-MJD (ATXN3) DNA Not Provided

Test Classification

This test was developed and its analytical performance characteristics have been determined by Athena Diagnostics. It has not been cleared or approved by the U. S. Food and Drug Administration. This assay has been validated pursuant to the CLIA regulations and is used for clinical purposes.

Report Available

14 to 32 days

NY State Approved