Diagnostic Work-up for Autoimmune Diseases

Initial Evaluation

A complete history focusing on symptoms of joint pain, infections, and family history of autoimmune disorders is essential for the diagnostic work-up of autoimmune diseases, according to the American College of Rheumatology 1
Physical examination with special attention to joint involvement, skin manifestations, and spleen size is crucial for identifying signs of autoimmune diseases, as recommended by the American College of Rheumatology 1
Laboratory evaluation of inflammatory markers, including erythrocyte sedimentation rate (ESR) and C-reactive protein (CRP), is necessary for assessing disease activity, as suggested by the American College of Rheumatology 1

A complete blood count (CBC) with differential is necessary to assess for cytopenias in patients with suspected autoimmune diseases, as recommended by the American Society of Clinical Oncology 2, 3
Comprehensive metabolic panel, including liver and kidney function tests, is essential for evaluating organ function in patients with autoimmune diseases, as suggested by the European Association for the Study of the Liver 4, 5
Antinuclear antibodies (ANA), rheumatoid factor (RF), and anti-cyclic citrullinated peptide (anti-CCP) antibodies should be tested to aid in the diagnosis of autoimmune diseases, as recommended by the American College of Rheumatology 6, 1
Inflammatory markers, such as ESR and CRP, should be monitored to assess disease activity, as suggested by the American College of Rheumatology 6, 1

For suspected autoimmune hepatitis, liver function tests, serum immunoglobulins, and liver-specific autoantibodies should be tested, as recommended by the European Association for the Study of the Liver 4, 5
Liver biopsy is considered a prerequisite for diagnosis of autoimmune hepatitis, as suggested by the European Association for the Study of the Liver 5
For suspected inflammatory myositis, creatine kinase (CK), transaminases, lactate dehydrogenase (LDH), and aldolase should be tested, as recommended by the American Society of Clinical Oncology 7, 8
Troponin should be tested to evaluate for myocardial involvement in patients with suspected inflammatory myositis, as suggested by the American Society of Clinical Oncology 7, 8

Joint radiographs should be performed for suspected inflammatory arthritis, as recommended by the American College of Rheumatology 1
Abdominal ultrasound or CT scan should be performed to evaluate for organomegaly in suspected systemic disease, as suggested by the American College of Rheumatology 1
Muscle MRI should be performed for suspected inflammatory myopathies, as recommended by the American Society of Clinical Oncology 7, 8

Early referral to rheumatology is essential for suspected autoimmune disease, as recommended by the American College of Rheumatology 6, 1
Initial treatment with corticosteroids (prednisone) at appropriate doses based on disease severity is necessary, as suggested by the American College of Rheumatology 6, 1

Regular monitoring of disease activity through clinical assessment and laboratory markers is essential, as recommended by the American College of Rheumatology 1
Periodic assessment of organ function based on systems involved is necessary, as suggested by the European Association for the Study of the Liver 5, 1

Relying solely on autoantibody testing without clinical correlation is a common pitfall, as warned by the European Association for the Study of the Liver 5
Delaying treatment while awaiting complete diagnostic work-up in severe presentations is a common pitfall, as warned by the American Society of Clinical Oncology 6
Not screening for infectious diseases (HIV, hepatitis, tuberculosis) before starting immunosuppressive therapy is a common pitfall, as warned by the American Society of Clinical Oncology 6, 8