Ordering Recommendation

Useful for the evaluation of classic paraneoplastic neurologic syndrome.


Qualitative Immunoblot


Mon, Thu, Sat


1-4 days

New York DOH Approval Status
This test is New York DOH approved.
Specimen Required
Patient Preparation

Serum separator tube

Specimen Preparation

Separate serum from cells ASAP or within 2 hours of collection. Transfer 1 mL serum to an ARUP Standard Transport Tube. (Min: 0.15 mL)

Storage/Transport Temperature


Unacceptable Conditions

Plasma. Contaminated, heat-inactivated, hemolyzed, or lipemic specimens


After separation from cells: Ambient: 24 hours; Refrigerated: 2 weeks; Frozen: 1 year

Reference Interval

None Detected

Interpretive Data

This test detects IgG antineuronal antibodies to Hu, Ri, and Yo antigens. Only the antibodies detected are reported in the result field.

Antineuronal antibodies serve as markers that aid in discriminating between a true paraneoplastic neurological disorder (PND) and other inflammatory disorders of the nervous system. Anti-Hu (antineuronal nuclear antibody, type I) is associated with small-cell lung cancer. Anti-Ri (antineuronal nuclear antibody, type II) is associated with neuroblastoma in children and with fallopian tube and breast cancer in adults. Anti-Yo (anti-Purkinje cell cytoplasmic antibody) is associated with ovarian and breast cancer.

The presence of one or more of these antineuronal antibodies supports a clinical diagnosis of PND and should lead to a focused search for the underlying neoplasm.

Compliance Statement D: For laboratory tests using a manufactured RUO kit. This test was developed and its performance characteristics determined by ARUP Laboratories. The U. S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.

Hotline History
CPT Codes


Component Test Code* Component Chart Name LOINC
2007964 Neuronal Nuclear Abs IgG, Immunoblot 35278-1
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
  • Hu, Ri, and Yo Ab
  • Neuronal Ab Immunoblot
  • Neuronal Nuclear Ab IgG
Neuronal Nuclear Antibodies (Hu, Ri, Yo) IgG by Immunoblot (INACTIVE as of 08/17/20: Refer to 3002917 in the August Hotline)