ANTI CENTROMERE ANTIBODIES

The Anti-Centromere Antibodies (ACA) Test is a specialized blood test used to detect antibodies directed against centromere proteins found within the nucleus of cells. These autoantibodies are strongly associated with limited cutaneous systemic sclerosis (limited scleroderma), also known as CREST syndrome, and may also be present in other autoimmune connective tissue disorders.

The Anti-Centromere Antibodies Test plays an important role in the diagnosis and evaluation of autoimmune diseases. It is commonly ordered when patients have symptoms such as Raynaud's phenomenon, skin tightening, finger ulcers, or unexplained connective tissue disease. Early diagnosis helps physicians begin appropriate treatment and monitor disease progression.

Benefits of the Test

• Helps diagnose limited systemic sclerosis (CREST syndrome).
• Detects Anti-Centromere antibodies with high specificity.
• Supports evaluation of autoimmune connective tissue disorders.
• Assists in differentiating scleroderma from other autoimmune diseases.
• Helps guide treatment planning and long-term monitoring.
• Complements ANA and ENA antibody testing.

Why Doctors Recommend This Test

Doctors may recommend the Anti-Centromere Antibodies Test for individuals with symptoms suggestive of systemic sclerosis or other autoimmune disorders, including:

• Raynaud's phenomenon (fingers turning white or blue in cold temperatures)
• Tight or thickened skin
• Swollen fingers or hands
• Finger ulcers or poor wound healing
• Heartburn or difficulty swallowing
• Joint pain or stiffness
• Fatigue
• Positive Antinuclear Antibody (ANA) test

The test is frequently performed alongside ANA Profile, ENA Panel, Anti-Scl-70 Antibody Test, ESR, CRP, and other autoimmune investigations.

Preparation Before Test

• No fasting is required.
• Continue routine medications unless advised otherwise by your physician.
• Inform your healthcare provider about your medical history and current medications.
• A blood sample is collected for laboratory analysis.

Normal Reporting Time

Reporting Time: Usually 2–5 working days, depending on laboratory processing protocols.

Who Should Take This Test?

This test is recommended for:

• Individuals with suspected systemic sclerosis (scleroderma).
• Patients with CREST syndrome symptoms.
• Individuals with Raynaud's phenomenon.
• Patients with unexplained connective tissue disease.
• Individuals with a positive ANA test requiring further evaluation.
• Patients referred by rheumatologists for autoimmune disease assessment.

Patient-Friendly Summary

The Anti-Centromere Antibodies Test is a blood test that helps diagnose limited systemic sclerosis (CREST syndrome), an autoimmune disease in which the immune system attacks healthy tissues. This condition commonly affects the skin, blood vessels, and digestive system. Symptoms may include cold-sensitive fingers (Raynaud's phenomenon), skin tightening, finger ulcers, swallowing difficulties, and joint stiffness. Detecting Anti-Centromere antibodies helps doctors identify the disease early, differentiate it from other autoimmune conditions, and plan appropriate treatment. The test is simple, safe, requires only a blood sample, and does not require fasting.