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Zorluk: ZorRheumatology and Immunology

Match each characteristic physical examination or radiographic hand finding to the most likely underlying rheumatologic or musculoskeletal condition.

  • Reducible ulnar deviation of the metacarpophalangeal joints and swan-neck deformities without radiographic evidence of periarticular bone erosionsSystemic lupus erythematosus
  • Pencil-in-cup appearance on plain radiography accompanied by concurrent diffuse, painful swelling of an entire digitPsoriatic arthritis
  • Hook-like osteophytes at the second and third metacarpophalangeal joints, often accompanied by chondrocalcinosisHemochromatosis-associated arthropathy
  • Asymmetric periarticular erosions with overhanging cortical edges, frequently described as 'rat-bite' lesionsChronic tophaceous gout
  • Squaring of the first carpometacarpal joint with firm, bony enlargement of the distal interphalangeal jointsOsteoarthritis

Cevap

The correct matches correlate specific patterns of joint involvement and radiographic destruction to their classic etiologies: SLE (Jaccoud arthropathy), Psoriatic arthritis (pencil-in-cup, dactylitis), Hemochromatosis (2nd/3rd MCP hook-like osteophytes), Gout (rat-bite erosions), and Osteoarthritis (1st CMC squaring, Heberden nodes).
Each condition presents with a highly specific anatomical and radiographic pattern. SLE features ligamentous laxity without bone erosion (Jaccoud arthropathy). Psoriatic arthritis combines inflammation of the entire digit (dactylitis) with aggressive osteolysis (pencil-in-cup). Hemochromatosis uniquely targets the 2nd and 3rd MCP joints. Chronic gout produces asymmetric, overhanging erosions from tophi. Osteoarthritis targets the DIP and 1st CMC joints with osteophyte formation rather than inflammatory erosions.

Adım Adım Çözüm

1
Analyze the description of non-erosive, reducible hand deformities.
Matches with Systemic lupus erythematosus.
Reducible deformities without bone destruction are the hallmark of Jaccoud arthropathy, typical of SLE.
2
Identify the etiology of diffuse digit swelling with 'pencil-in-cup' destructive changes.
Matches with Psoriatic arthritis.
Dactylitis and aggressive focal osteolysis at the interphalangeal joints point directly to psoriatic arthritis.
3
Evaluate atypical metacarpophalangeal involvement featuring hook-like osteophytes.
Matches with Hemochromatosis-associated arthropathy.
The 2nd and 3rd MCP joints are classically affected in hemochromatosis, distinctly differentiating it from primary osteoarthritis.
4
Associate periarticular erosions featuring overhanging edges with a specific crystal arthropathy.
Matches with Chronic tophaceous gout.
Tophi cause mechanical displacement and erosions of adjacent bone, producing the classic 'rat-bite' radiographic appearance.
5
Recognize classic degenerative changes involving the thumb base and distal fingers.
Matches with Osteoarthritis.
Squaring of the 1st CMC joint and bony hypertrophy of the DIP joints (Heberden nodes) are the most common presentations of primary osteoarthritis.

Anahtar Kavram

Distinctive radiographic and clinical hand findings reliably differentiate among various crystal-induced, autoimmune, and degenerative arthropathies.
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Rheumatology and Immunology

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