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Catalog ID RNP70 RNP70 Antibody

CPT Code

86235

Specimen

1.2 mL whole blood in gold top tube. Red top tube also acceptable. Minimum 0.5 mL serum

Rejection Criteria

Incorrect tube, insufficient specimen, unlabelled specimen

Interpretative Information

RNP70 (aka RNP 70kDA) antibodies may be more specific for Mixed Connected Tissue Disease (MCTD).

A definitive clinical diagnosis should not be based on the results of a single diagnostic method, but should only be made by the physician after all clinical and laboratory findings have been evaluated. This assay has a specificity of 94.7% and a sensitivity of 64.3%.

Performing Lab

Immunology Laboratory, Core Lab - AD3301, x1-3378

Turn-Around-Time

1-3 business days

Reference Values

<7 U/mL = Negative

7-10 U/mL = Equivocal, repeat in 8-12 weeks

>10 U/mL = Positive