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Test ID STR Striational (Striated Muscle) Antibodies, Serum

Useful For

As a serological aid in the diagnosis of thymoma, especially in patients with onset of myasthenia gravis (MG) younger than 45 years


As a screening test for MG in older patients, especially when tests for muscle acetylcholine receptor (AChR) antibodies are negative


Serial measurements are useful in monitoring the efficacy of immunosuppressant treatment in patients with MG


Serial measurements are useful after treatment of thymoma


Serial measurements in recipients of D-penicillamine or bone marrow allografts may be useful in monitoring autoimmune complications and graft-versus-host disease, respectively

Method Name

Enzyme Linked Immunosorbent Assay (ELISA)

Reporting Name

Striational (Striated Muscle) Ab, S

Specimen Type


Specimen Required


Preferred: Red top

Acceptable: Serum gel

Specimen Volume: 1.5 mL

Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Serum Refrigerated (preferred) 28 days
  Frozen  28 days
  Ambient  72 hours

Reference Values


Day(s) and Time(s) Performed

Monday through Friday; 4 a.m. and 3 p.m.

Saturday; 6 a.m.

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
STR Striational (Striated Muscle) Ab, S 94817-4


Result ID Test Result Name Result LOINC Value
8746 Striational (Striated Muscle) Ab, S 94817-4

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

NY State Approved


Testing Algorithm

See Paraneoplastic Evaluation Algorithm in Special Instructions