Service Description

The RNP U1 IgG test detects IgG antibodies against U1 ribonucleoprotein, which can be associated with autoimmune conditions such as mixed connective tissue disease (MCTD) and systemic lupus erythematosus (SLE). Why it’s done: To help diagnose mixed connective tissue disease or other autoimmune disorders To evaluate unexplained joint pain, muscle weakness, or systemic symptoms To monitor disease progression or response to treatment To support differential diagnosis among connective tissue diseases To assess immune system activity in patients with systemic autoimmune symptoms Specimen Type: Blood draw Turnaround Time: Typically 3–5 business days Collection Available: In-office or mobile blood draw services