Anti-citrullinated peptide antibody (ACPA) tests are important diagnostic tools for specific autoimmune diseases. These antibodies target parts of the body that the immune system mistakenly attacks.
The test for Anti-citrullinated peptide antibody is primarily used to help diagnose Rheumatoid Arthritis (RA). ACPA is a specific type of autoantibody often found in people with RA.
Therefore, anti-citrullinated peptide antibody testing is highly significant for diagnosing Rheumatoid Arthritis.
Which of the following features are associated with poor prognosis in Diffuse Cutaneous Systemic Sclerosis?
1. Older age
2. A high gas transfer factor for carbon monoxide (TLCO)
3. Proteinuria
4. Diffuse skin disease
Select the correct answer using the code given below: