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Sm/RNP Abs
Access Labcorp Draw · Quest Diagnostics2 test optionsFrom $38.33
Sm/RNP Abs
Access Labcorp Draw · Quest DiagnosticsCatalog information reviewed: August 24, 2026 by the Sunridge Medical clinical team.
What this laboratory test evaluates
DetailsSm/RNP Antibody – This test detects the presence of Smith (Sm)/U1-RNP Antibody, which is often found in patients with mixed connective tissue disease. This condition shares characteristics of systemic lupus erythematosus (SLE), scleroderma, and polymyositis, making this test crucial for diagnosis.
What patients is this test right for?This test is particularly useful for individuals showing symptoms or having a diagnosis that suggests mixed connective tissue disease, including features of SLE, scleroderma, and polymyositis.
What type of sample is required for this test?1 mL serum. Phlebotomy is required.
Additional test information
This test detects the presence of Smith (Sm)/U1-RNP Antibody, which is often found in patients with mixed connective tissue disease.
Collection and processing
- Sample type: Serum
- Fasting: No
- Estimated laboratory processing: Results should be available in 2 – 5 business days after the sample is collected
How Sunridge uses laboratory information
Sunridge considers the medical question, symptoms, history, medications, prior results, and whether the finding could change care before recommending testing. A laboratory result is not interpreted in isolation and does not establish a diagnosis by itself.
Before requesting this test
Availability, collection requirements, eligibility, and processing estimates can change. Sunridge reviews each request and, when appropriate, creates the order through Fullscript. Follow the current instructions supplied with the approved order.
Common questions about this laboratory test
- What sample does this test require?
- The listed sample type is Serum. Confirm current collection instructions in the approved order.
- Does this test require fasting?
- The current catalog record lists fasting as: No. Follow the instructions supplied with the approved order.
- How long does laboratory processing usually take?
- Results should be available in 2 – 5 business days after the sample is collected. Timing can change after collection or if a laboratory requires additional review.
About this test
DetailsSm/RNP Antibody - This test detects the presence of Smith (Sm)/U1-RNP Antibody, which is often found in patients with mixed connective tissue disease. This condition shares characteristics of systemic lupus erythematosus (SLE), scleroderma, and polymyositis, making this test crucial for diagnosis.
What patients is this test right for?This test is particularly useful for individuals showing symptoms or having a diagnosis that suggests mixed connective tissue disease, including features of SLE, scleroderma, and polymyositis.
What type of sample is required for this test?1 mL serum. Phlebotomy is required.
Additional details
This test detects the presence of Smith (Sm)/U1-RNP Antibody, which is often found in patients with mixed connective tissue disease.
Highlighted health areas
- Autoimmune
Biomarkers and report focus
The exact analytes and report format can change. Confirm the current contents in the Fullscript order before payment.
- Sm/RNP Antibody