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Difficulty: EasyRheumatology and Immunology

Match each autoantibody to its most characteristic associated rheumatologic condition or clinical feature.

  • Anti-cyclic citrullinated peptide (anti-CCP) antibodiesHighly specific for Rheumatoid Arthritis; indicates a higher likelihood of aggressive disease.
  • Anti-double-stranded DNA (anti-dsDNA) antibodiesHighly specific for Systemic Lupus Erythematosus; titer correlates with disease activity and lupus nephritis.
  • Anti-centromere antibodiesAssociated with Limited Cutaneous Systemic Sclerosis; indicates higher risk for pulmonary arterial hypertension.
  • Anti-Scl-70 (anti-topoisomerase I) antibodiesAssociated with Diffuse Cutaneous Systemic Sclerosis; indicates higher risk for interstitial lung disease.

Answer

The correct matches are: Anti-CCP with Rheumatoid Arthritis; Anti-dsDNA with Systemic Lupus Erythematosus; Anti-centromere with Limited Cutaneous Systemic Sclerosis; and Anti-Scl-70 with Diffuse Cutaneous Systemic Sclerosis.
Autoantibodies serve as crucial diagnostic and prognostic markers in rheumatology. Anti-CCP is highly specific for Rheumatoid Arthritis. Anti-dsDNA is specific for SLE and tracks disease activity. Anti-centromere and anti-Scl-70 help differentiate between limited and diffuse cutaneous systemic sclerosis, respectively, with each carrying distinct clinical features and visceral risks.

Step-by-Step Solution

1
Identify the disease association for anti-CCP antibodies.
Matches with Rheumatoid Arthritis.
Anti-CCP is the most specific serological marker for RA.
2
Identify the disease association for anti-dsDNA antibodies.
Matches with Systemic Lupus Erythematosus.
Anti-dsDNA is specific to SLE and its titer correlates with disease flares and renal involvement.
3
Identify the disease association for anti-centromere antibodies.
Matches with Limited Cutaneous Systemic Sclerosis.
It is the defining serological feature of limited systemic sclerosis (CREST syndrome).
4
Identify the disease association for anti-Scl-70 antibodies.
Matches with Diffuse Cutaneous Systemic Sclerosis.
It distinguishes the diffuse form of systemic sclerosis from the limited form and predicts a higher risk of interstitial lung disease.

Key Concept

Clinical utility of specific autoantibodies in the diagnosis and prognostication of systemic autoimmune diseases.
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Topics

Rheumatology and Immunology

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