Examkin

Soru

Zorluk: OrtaDiagnostic Workup and Test Sequencing

Match each patient's clinical presentation with the most appropriate next step in their diagnostic workup.

  • A previously healthy 52-year-old mechanic develops sudden, severe swelling and erythema in his right knee, accompanied by a temperature of 38.2°C (100.8°F).Arthrocentesis with synovial fluid cell count, Gram stain, and crystal analysis
  • A 35-year-old teacher with a recently identified positive antinuclear antibody (ANA) titer seeks further assessment for new-onset symmetric polyarthritis, a facial malar rash, and recurrent oral aphthous ulcers.Serologic testing for anti-double-stranded DNA and anti-Smith antibodies
  • A 28-year-old software developer describes a progressive six-month history of lumbar pain that is most severe upon awakening, improves after morning exercise, and frequently disrupts his sleep.Plain radiography of the sacroiliac joints and lumbar spine
  • A 45-year-old graphic designer complains of worsening pain in both wrists and the small joints of her hands, reporting that her joints feel profoundly stiff for over two hours every morning.Serum assay for rheumatoid factor and anti-cyclic citrullinated peptide (anti-CCP) antibodies

Cevap

The correct pairings align acute monoarthritis with arthrocentesis, suspected systemic lupus erythematosus with anti-dsDNA/anti-Smith antibodies, inflammatory back pain with sacroiliac radiography, and suspected rheumatoid arthritis with RF/anti-CCP serologies.
Each correct pairing reflects the guideline-directed initial diagnostic approach based on the specific rheumatologic phenotype. Acute monoarthritis requires definitive fluid analysis via arthrocentesis. Suspected SLE with a positive screening ANA requires specific confirmatory serologies. Inflammatory back pain necessitates targeted imaging of the sacroiliac joints. Symmetric polyarthritis with prolonged stiffness requires classic rheumatoid serologies for confirmation.

Adım Adım Çözüm

1
Analyze the patient presenting with an acutely swollen, red, and febrile knee.
Identify this presentation as a potential joint-threatening infection (septic arthritis).
Before considering less invasive testing, septic arthritis must be definitively ruled out via arthrocentesis to prevent irreversible joint destruction.
2
Evaluate the patient with a positive ANA and clinical signs of systemic lupus erythematosus.
Sequence the diagnostic workup toward highly specific confirmatory tests.
An ANA test is an initial screening tool; anti-double-stranded DNA and anti-Smith antibodies are necessary to secure the diagnosis of SLE due to their high specificity.
3
Assess the young male with chronic back pain that improves with exercise.
Recognize the inflammatory pattern indicative of axial spondyloarthritis.
The initial diagnostic step for suspected ankylosing spondylitis or axial spondyloarthritis relies on objective imaging evidence of inflammation in the sacroiliac joints.
4
Evaluate the patient with symmetric polyarthritis and prolonged morning stiffness.
Identify a high pre-test probability for rheumatoid arthritis.
Guideline-directed evaluation for rheumatoid arthritis begins with obtaining rheumatoid factor and anti-CCP levels to aid in both diagnosis and prognostic assessment.

Anahtar Kavram

Diagnostic test sequencing for rheumatologic conditions prioritizes the urgent exclusion of joint-threatening infections, followed by the targeted use of specific serologies and imaging dictated by the distinct clinical phenotype.
Bu soruyu puanla

Konular

Diagnostic Workup and Test Sequencing

Bu konudan daha fazla soru