What does a positive anti-Smith antibody mean?
A positive result for anti-Sm antibodies is consistent with a diagnosis of lupus erythematosus.
What is Smith IGG antibody?
Smith antibody is highly specific (greater than 90 percent) for systemic lupus erythematosus (SLE) but only occurs in 30-35 percent of SLE cases. The presence of antibodies to Smith has variable associations with SLE clinical manifestations.
What is considered a high level of anti dsDNA?
<30.0 IU/mL Negative 30.0 – 75.0 IU/mL Borderline >75.0 IU/mL Positive Negative is considered normal. changes in the levels of these antibodies should not be relied upon to predict changes in clinical course of patients with LE.
What is a normal range for Smith antibody?
Optimal Result: 0 – 7 U/mL. The Anti-Smith Antibody targets your body’s own proteins and is found almost exclusively in people with lupus. Though not all people with lupus have this antibody (only around 30%), those who do usually receive a diagnosis of lupus.
What disease is indicated by a high titer of anti-SM Anti-Smith antibody?
Anti-RNP are detectable in 25-47% of SLE patients; high titers of anti-RNP antibodies are diagnostic of mixed connective tissue disorder (MCTD). The measurement of anti-Sm and anti-RNP antibodies is more important in the diagnosis of SLE than in the follow-up of patients.
What is a normal dsDNA?
Interpretation: A NORMAL result is < 10 IU/mL (NEGATIVE). An EQUIVOCAL result is 10 – 15 IU/mL. A POSITIVE result is > 15 IU/mL The results obtained by this method should serve as an aid to diagnosis and should not be interpreted as diagnostic in itself.
What is a positive anti Smith antibody?
Anti Smith Antibody Test. Antibody tests are blood tests that determine specific antibodies which simplify the diagnosis of lupus, Antinuclear antibody (ANA) Anti-RNP. Anti-Smith (Sm),.Anti-Smith antibodies are present in some cases of systemic lupus erythematosus (SLE) and mixed connective-tissue disease (MCTD).
What are Smith antibodies?
Smith Antibody (Sm) is highly specific for systemic lupus erythematosus (SLE). Smith Antibody is also detected in approximately 15% of patients with SLE. Smith Antibody is detected in more than half of young African-American women with SLE.
What is Smith antibody test?
Smith,or Sm,antibodies are associated with an autoimmune disorder called systemic lupus erythematosus (SLE).
What does a positive RNP antibody mean?
Ribonucleoprotein (RNP): A combination of ribonucleic acid (RNA) and protein. In autoimmune diseases, antibodies can form against ribonucleoprotein. They are called anti-RNP antibodies.