Test Code DMC2 Dementia, Autoimmune/Paraneoplastic Evaluation, Spinal Fluid
Ordering Guidance
Multiple neuroimmunology profile tests are available. For testing that is performed with each profile, see Autoimmune Neurology Antibody Matrix.
Necessary Information
Provide the following information:
-Relevant clinical information
-Ordering provider name, phone number, mailing address, and e-mail address
Specimen Required
Collection Container/Tube: Sterile vial
Specimen Volume: 4 mL
Forms
If not ordering electronically, complete, print, and send a Neurology Specialty Testing Client Test Request (T732) with the specimen.
Useful For
Investigating new onset dementia and cognitive impairment plus 1 or more of the following accompaniments using cerebrospinal fluid specimens:
-Rapid onset and progression
-Fluctuating course
-Psychiatric accompaniments (psychosis, hallucinations)
-Movement disorder (myoclonus, tremor, dyskinesias)
-Headache
-Autoimmune stigmata (personal history or family history or signs of diabetes mellitus, thyroid disorder, vitiligo, poliosis [premature graying], myasthenia gravis, rheumatoid arthritis, systemic lupus erythematosus)
-Smoking history (over 20 pack-years) or other cancer risk factors
-History of cancer
-Inflammatory cerebrospinal fluid
-Neuroimaging findings atypical for degenerative etiology
Profile Information
Test ID | Reporting Name | Available Separately | Always Performed |
---|---|---|---|
ADMCI | Dementia, Interpretation, CSF | No | Yes |
AMPCC | AMPA-R Ab CBA, CSF | No | Yes |
AMPHC | Amphiphysin Ab, CSF | No | Yes |
AGN1C | Anti-Glial Nuclear Ab, Type 1 | No | Yes |
ANN1C | Anti-Neuronal Nuclear Ab, Type 1 | No | Yes |
ANN2C | Anti-Neuronal Nuclear Ab, Type 2 | No | Yes |
ANN3C | Anti-Neuronal Nuclear Ab, Type 3 | No | Yes |
CS2CC | CASPR2-IgG CBA, CSF | No | Yes |
CRMC | CRMP-5-IgG, CSF | No | Yes |
DPPIC | DPPX Ab IFA, CSF | No | Yes |
GABCC | GABA-B-R Ab CBA, CSF | No | Yes |
GD65C | GAD65 Ab Assay, CSF | Yes | Yes |
GFAIC | GFAP IFA, CSF | No | Yes |
IG5IC | IgLON5 IFA, CSF | No | Yes |
LG1CC | LGI1-IgG CBA, CSF | No | Yes |
GL1IC | mGluR1 Ab IFA, CSF | No | Yes |
NIFIC | NIF IFA, CSF | No | Yes |
NMDCC | NMDA-R Ab CBA, CSF | No | Yes |
PCTRC | Purkinje Cell Cytoplasmc Ab Type Tr | No | Yes |
PCA2C | Purkinje Cell Cytoplasmic Ab Type 2 | No | Yes |
Reflex Tests
Test ID | Reporting Name | Available Separately | Always Performed |
---|---|---|---|
AGNBC | AGNA-1 Immunoblot, CSF | No | No |
AINCC | Alpha Internexin CBA, CSF | No | No |
AMPIC | AMPA-R Ab IF Titer Assay, CSF | No | No |
AMIBC | Amphiphysin Immunoblot, CSF | No | No |
AN1BC | ANNA-1 Immunoblot, CSF | No | No |
AN2BC | ANNA-2 Immunoblot, CSF | No | No |
CRMWC | CRMP-5-IgG Western Blot, CSF | Yes | No |
DPPCC | DPPX Ab CBA, CSF | No | No |
DPPTC | DPPX Ab IFA Titer, CSF | No | No |
GABIC | GABA-B-R Ab IF Titer Assay, CSF | No | No |
GFACC | GFAP CBA, CSF | No | No |
GFATC | GFAP IFA Titer, CSF | No | No |
IG5CC | IgLON5 CBA, CSF | No | No |
IG5TC | IgLON5 IFA Titer, CSF | No | No |
GL1CC | mGluR1 Ab CBA, CSF | No | No |
GL1TC | mGluR1 Ab IFA Titer, CSF | No | No |
NFHCC | NIF Heavy Chain CBA, CSF | No | No |
NIFTC | NIF IFA Titer, CSF | No | No |
NFLCC | NIF Light Chain CBA, CSF | No | No |
NMDIC | NMDA-R Ab IF Titer Assay, CSF | No | No |
PC1BC | PCA-1 Immunoblot, CSF | No | No |
PCTBC | PCA-Tr Immunoblot, CSF | No | No |
PCA1C | Purkinje Cell Cytoplasmic Ab Type 1 | No | No |
Testing Algorithm
If indirect immunofluorescence assay (IFA) pattern suggests antiglial nuclear antibody (AGNA)-1 antibody, then AGNA-1 immunoblot is performed at an additional charge.
If IFA pattern suggests antineuronal nuclear antibodies (ANNA)-1 antibody, then ANNA-1 immunoblot is performed at an additional charge.
If IFA pattern suggests ANNA-2 antibody, then ANNA-2 immunoblot is performed at an additional charge.
If IFA pattern suggests amphiphysin antibody, then amphiphysin immunoblot is performed at an additional charge.
If IFA pattern suggests Purkinje cytoplasmic antibody (PCA)-1 antibody, then PCA-1 immunoblot is performed at an additional charge.
If IFA pattern suggests PCA-Tr antibody, then PCA-Tr immunoblot is performed at an additional charge.
If client requests or if IFA patterns suggest collapsin response-mediator protein-5 (CRMP-5)-IgG, then CRMP-5-IgG Western blot is performed at an additional charge.
If IFA pattern suggests alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid (AMPA)-receptor antibody, and AMPA-receptor antibody cell-binding assay (CBA) is positive, then AMPA-receptor antibody IFA titer assay is performed at an additional charge.
If IFA pattern suggests gamma-aminobutyric acid (GABA)-B-receptor antibody, and GABA-B-receptor antibody CBA is positive, then GABA-B-receptor antibody IFA titer assay is performed at an additional charge.
If IFA pattern suggests glial fibrillary acidic protein (GFAP) antibody, then GFAP IFA titer and GFAP CBA are performed at an additional charge.
If IFA pattern suggests N-methyl-D-aspartate (NMDA)-receptor antibody, and NMDA-receptor antibody CBA is positive, then NMDA-receptor antibody IFA titer assay is performed at an additional charge.
If IFA pattern suggests dipeptidyl-peptidase-like protein-6 (DPPX) antibody, then DPPX antibody CBA and DPPX antibody IFA titer are performed at an additional charge.
If IFA pattern suggests metabotropic glutamate receptor 1 (mGluR1) antibody, then mGluR1 antibody CBA and mGluR1 antibody IFA titer are performed at an additional charge.
If IFA pattern suggests IgLON5 antibody, then IgLON5 antibody CBA and IgLON5 IFA titer are performed at an additional charge.
If IFA pattern suggests neuronal intermediate filament (NIF) antibody, then alpha internexin CBA, NIF heavy chain CBA, NIF light chain CBA, and NIF IFA titer are performed at an additional charge.
For more information, see Autoimmune/Paraneoplastic Dementia Evaluation Algorithm-Spinal Fluid.
Special Instructions
Method Name
AGN1C, AMPHC, AMPIC, ANN1C, ANN2C, ANN3C, CRMC, DPPIC, DPPTC, GABIC, GFAIC, GFATC, GL1IC, GL1TC, IG5IC, IG5TC, NIFIC, NIFTC, NMDIC, PCA1C, PCA2C, PCTRC: Indirect Immunofluorescence Assay (IFA)
AINCC, AMPCC, CS2CC, DPPCC, GABCC, GFACC, GL1CC, IG5CC, LG1CC, NFHCC, NFLCC, NMDCC: Cell-Binding Assay (CBA)
AGNBC, AMIBC, AN1BC, AN2BC, PC1BC, PCTBC: Immunoblot (IB)
CRMWC: Western Blot (WB)
GD65C: Radioimmunoassay (RIA)
Reporting Name
Dementia, Autoimm/Paraneo, CSFSpecimen Type
CSFSpecimen Minimum Volume
2 mL
Specimen Stability Information
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
CSF | Refrigerated (preferred) | 28 days | |
Frozen | 28 days | ||
Ambient | 72 hours |
Reject Due To
Gross hemolysis | Reject |
Gross lipemia | Reject |
Gross icterus | Reject |
Reference Values
Test ID |
Reporting name |
Methodology* |
Reference value |
ADMCI |
Dementia, Interpretation, CSF |
Medical interpretation |
NA |
AMPCC |
AMPA-R Ab CBA, CSF |
CBA |
Negative |
AMPHC |
Amphiphysin Ab, CSF |
IFA |
<1:2 |
AGN1C |
Anti-Glial Nuclear Ab, Type 1 |
IFA |
<1:2 |
ANN1C |
Anti-Neuronal Nuclear Ab, Type 1 |
IFA |
<1:2 |
ANN2C |
Anti-Neuronal Nuclear Ab, Type 2 |
IFA |
<1:2 |
ANN3C |
Anti-Neuronal Nuclear Ab, Type 3 |
IFA |
<1:2 |
CS2CC |
CASPR2-IgG CBA, CSF |
CBA |
Negative |
CRMC |
CRMP-5-IgG, CSF |
IFA |
<1:2 |
DPPIC |
DPPX Ab IFA, CSF |
IFA |
Negative |
GABCC |
GABA-B-R Ab CBA, CSF |
CBA |
Negative |
GD65C |
GAD65 Ab Assay, CSF |
RIA |
≤0.02 nmol/L Reference values apply to all ages. |
GFAIC |
GFAP IFA, CSF |
IFA |
Negative |
IG5IC |
IgLON5 IFA, CSF |
IFA |
Negative |
LG1CC |
LGI1-IgG CBA, CSF |
CBA |
Negative |
GL1IC |
mGluR1 Ab IFA, CSF |
IFA |
Negative |
NIFIC |
NIF IFA, CSF |
IFA |
Negative |
NMDCC |
NMDA-R Ab CBA, CSF |
CBA |
Negative |
PCTRC |
Purkinje Cell Cytoplasmc Ab Type Tr |
IFA |
<1:2 |
PCA2C |
Purkinje Cell Cytoplasmic Ab Type 2 |
IFA |
<1:2 |
Reflex Information:
Test ID |
Reporting name |
Methodology* |
Reference value |
AGNBC |
AGNA-1 Immunoblot, CSF |
IB |
Negative |
AINCC |
Alpha Internexin CBA, CSF |
CBA |
Negative |
AMPIC |
AMPA-R Ab IF Titer Assay, CSF |
IFA |
<1:2 |
AMIBC |
Amphiphysin Immunoblot, CSF |
IB |
Negative |
AN1BC |
ANNA-1 Immunoblot, CSF |
IB |
Negative |
AN2BC |
ANNA-2 Immunoblot, CSF |
IB |
Negative |
CRMWC |
CRMP-5-IgG Western Blot, CSF |
WB |
Negative |
DPPCC |
DPPX Ab CBA, CSF |
CBA |
Negative |
DPPTC |
DPPX Ab IFA Titer, CSF |
IFA |
<1:2 |
GABIC |
GABA-B-R Ab IF Titer Assay, CSF |
IFA |
<1:2 |
GFACC |
GFAP CBA, CSF |
CBA |
Negative |
GFATC |
GFAP IFA Titer, CSF |
IFA |
<1:2 |
IG5CC |
IgLON5 CBA, CSF |
CBA |
Negative |
IG5TC |
IgLON5 IFA Titer, CSF |
IFA |
<1:2 |
GL1CC |
mGluR1 Ab CBA, CSF |
CBA |
Negative |
GL1TC |
mGluR1 Ab IFA Titer, CSF |
IFA |
<1:2 |
NFHCC |
NIF Heavy Chain CBA, CSF |
CBA |
Negative |
NIFTC |
NIF IFA Titer, CSF |
IFA |
<1:2 |
NFLCC |
NIF Light Chain CBA, CSF |
CBA |
Negative |
NMDIC |
NMDA-R Ab IF Titer Assay, CSF |
IFA |
<1:2 |
PC1BC |
PCA-1 Immunoblot, CSF |
IB |
Negative |
PCTBC |
PCA-Tr Immunoblot, CSF |
IB |
Negative |
PCA1C |
Purkinje Cell Cytoplasmic Ab Type 1 |
IFA |
<1:2 |
*Methodology abbreviations:
Immunofluorescence assay (IFA)
Cell-binding assay (CBA)
Western blot (WB)
Radioimmunoassay (RIA)
Immunoblot (IB)
Neuron-restricted patterns of IgG staining that do not fulfill criteria for ANNA-1, ANNA-2, ANNA-3, CRMP-5-IgG, PCA-1, PCA-2, or PCA-Tr may be reported as "unclassified anti-neuronal IgG." Complex patterns that include nonneuronal elements may be reported as "uninterpretable."
Note: CRMP-5 titers lower than 1:2 are detectable by recombinant CRMP-5 Western blot analysis. CRMP-5 Western blot analysis will be done on request on stored spinal fluid (held 4 weeks). This supplemental testing is recommended in cases of chorea, vision loss, cranial neuropathy, and myelopathy. Call the Neuroimmunology Laboratory at 800-533-1710 to request CRMP-5 Western blot.
Day(s) Performed
Profile tests: Monday through Sunday; Reflex tests: Varies
Report Available
8 to 11 daysPerforming Laboratory

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 US Food and Drug Administration.CPT Code Information
86255 x 18
86341
84182-AGNBC (if appropriate)
86255-AINCC (if appropriate)
86256-AMPIC (if appropriate)
84182-AMIBC (if appropriate)
84182-AN1BC (if appropriate)
84182-AN2BC (if appropriate)
84182-CRMWC (if appropriate)
86255-DPPCC (if appropriate)
86256-DPPTC (if appropriate)
86256-GABIC (if appropriate)
86255-GFACC (if appropriate)
86256-GFATC (if appropriate)
86255-IG5CC (if appropriate)
86256-IG5TC (if appropriate)
86255-GL1CC (if appropriate)
86256-GL1TC (if appropriate)
86255-NFHCC (if appropriate)
86256-NIFTC (if appropriate)
86255-NFLCC (if appropriate)
86256-NMDIC (if appropriate)
84182-PC1BC (if appropriate)
84182-PCTBC (if appropriate)
86255-PCA1C (if appropriate)
LOINC Code Information
Test ID | Test Order Name | Order LOINC Value |
---|---|---|
DMC2 | Dementia, Autoimm/Paraneo, CSF | 94707-7 |
Result ID | Test Result Name | Result LOINC Value |
---|---|---|
61513 | NMDA-R Ab CBA, CSF | 93502-3 |
61514 | AMPA-R Ab CBA, CSF | 93491-9 |
61515 | GABA-B-R Ab CBA, CSF | 93426-5 |
34254 | Dementia, Interpretation, CSF | 69048-7 |
64280 | LGI1-IgG CBA, CSF | 94288-8 |
64282 | CASPR2-IgG CBA, CSF | 94286-2 |
64929 | DPPX Ab IFA, CSF | 82989-5 |
64927 | mGluR1 Ab IFA, CSF | 94361-3 |
605156 | GFAP IFA, CSF | 94360-5 |
606965 | NIF IFA, CSF | 96490-8 |
606947 | IgLON5 IFA, CSF | 96479-1 |
89079 | AGNA-1, CSF | 94355-5 |
5906 | Amphiphysin Ab, CSF | 94354-8 |
3852 | ANNA-1, CSF | 94356-3 |
7472 | ANNA-2, CSF | 94357-1 |
21633 | ANNA-3, CSF | 94358-9 |
21650 | CRMP-5-IgG, CSF | 94706-9 |
21632 | PCA-2, CSF | 94364-7 |
21631 | PCA-Tr, CSF | 94362-1 |
21702 | GAD65 Ab Assay, CSF | 94359-7 |
36429 | Reflex Added | 77202-0 |