Glutamic Acid Decarb 65 Ab

• CPT Code: 86341
• LOINC: 30347-9
• Specimen Type: Red or SST
• Frequency: Setup: Sun-Thur; analytic time 3 days
• Instructions: 1.5mL serum from red or SST. Refrigerate. Min 1.0mL.
• Text: GAD is a neuronal enzyme involved in synthesis of the neurotransmitter GABA. Antibodies directed against the 65-kd isoform of GAD are seen in a variety of autoimmune neurologic disorders including stiff-man syndrome, autoimmune cerebellitis, brain stem encephalitis, seizure disorders, neuromyelitisoptica and other myelopathies, myasthenia gravis, etc.
• Methodology: Radioimmunoassay (RIA)