What is the primary clinical feature of psoriatic arthritis that helps distinguish it from other inflammatory arthritides?
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Approach to psoriatic arthritis, ankylosing spondylitis, and other spondyloarthropathies.
Mastering this deck will enhance your ability to recognize, differentiate, and manage various spondyloarthropathies beyond rheumatoid arthritis, improving diagnostic accuracy and optimizing treatment strategies in clinical practice.
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| # | Front | Back | Hint |
|---|---|---|---|
| 1 | What is the primary clinical feature of psoriatic arthritis that helps distinguish it from other inflammatory arthritides? | Psoriatic arthritis often presents with dactylitis ('sausage digits') and enthesitis, along with psoriasis skin lesions; it may also involve asymmetric oligoarthritis or distal interphalangeal joint involvement. | Think 'D.E.P.' โ Dactylitis, Enthesitis, Psoriasis |
| 2 | Which HLA allele is most strongly associated with ankylosing spondylitis? | HLA-B27 is the most strongly associated genetic marker with ankylosing spondylitis. | HLA-B27 is the key genetic factor in axial spondyloarthropathies. |
| 3 | What is the characteristic radiographic finding in advanced ankylosing spondylitis? | Bamboo spine appearance due to syndesmophyte formation and fusion of the vertebral bodies. | Think 'bamboo' to remember the spinal fusion. |
| 4 | Which clinical feature is common in both psoriatic arthritis and ankylosing spondylitis? | Enthesitis, the inflammation at sites where tendons or ligaments insert into bone, is common to both conditions. | Enthesitis links both diseasesโremember 'E' for Enthesitis. |
| 5 | What is the primary goal in managing axial spondyloarthritis? | To reduce inflammation, manage pain, preserve spinal mobility, and prevent structural damage. | Focus on inflammation control to prevent progression. |
| 6 | Name a first-line pharmacologic treatment for active psoriatic arthritis. | NSAIDs are first-line for symptom relief; DMARDs like methotrexate are used for peripheral joint involvement, and biologics for more severe or refractory cases. | Start with NSAIDs, escalate as needed. |
| 7 | Which class of biologics is commonly used in treating ankylosing spondylitis? | Tumor necrosis factor-alpha (TNF-ฮฑ) inhibitors, such as infliximab, etanercept, and adalimumab. | TNF inhibitors are the cornerstone biologics here. |
| 8 | What extra-articular manifestation is frequently associated with psoriatic arthritis? | Uveitis and psoriasis skin lesions are common extra-articular features. | Think skin and eyes for psoriatic features. |
| 9 | How does the management approach differ between axial and peripheral spondyloarthropathies? | Axial disease primarily focuses on NSAIDs and biologics targeting axial inflammation; peripheral disease may include DMARDs like methotrexate, with a broader range of options. | Location guides therapy choices. |
| 10 | What is the role of imaging in diagnosing spondyloarthropathies? | MRI is sensitive for early inflammation and sacroiliitis; X-rays can show structural changes like syndesmophytes and joint fusion in advanced disease. | MRI detects early inflammation before structural damage. |
| 11 | Name a non-pharmacologic intervention helpful in managing ankylosing spondylitis. | Regular physical therapy and stretching exercises to maintain spinal flexibility and posture. | Exercise is as important as medication. |
| 12 | Which cytokine pathway is targeted by newer biologic agents in spondyloarthropathies? | Interleukin-17 (IL-17) pathway, targeted by agents like secukinumab. | IL-17 inhibitors are emerging options. |
| 13 | What is the significance of HLA-B27 positivity in patients with spondyloarthropathies? | HLA-B27 positivity increases the risk of developing the disease and correlates with more severe or axial disease, but is not diagnostic alone. | Genetic marker, not definitive diagnosis. |
| 14 | In psoriatic arthritis, what is the role of methotrexate? | Methotrexate is used to control peripheral joint inflammation and skin psoriasis but has limited efficacy for axial disease. | Good for joints and skin, less for spine. |
| 15 | What differentiates reactive arthritis from other spondyloarthropathies? | Reactive arthritis occurs after an infection (often gastrointestinal or genitourinary) and involves asymmetric oligoarthritis, often with conjunctivitis and urethritis ('Reiter's syndrome'). | Think 'post-infection' arthritis. |
| 16 | Which laboratory test is most useful in supporting the diagnosis of spondyloarthropathies? | HLA-B27 testing supports suspicion but is not definitive; CRP and ESR indicate inflammation but are nonspecific. | HLA-B27 adds clues, not confirmation. |
| 17 | What are the main goals of treatment in spondyloarthropathies? | Reduce inflammation, relieve pain, improve function, prevent structural damage, and enhance quality of life. | Treatment aims at controlling disease activity. |
| 18 | Can NSAIDs be used as a long-term treatment in spondyloarthropathies? | Yes, NSAIDs are often used long-term to control symptoms, but their use should be balanced against side effects. | Mainstay for symptom management. |
| 19 | What is the significance of enthesitis in spondyloarthropathies? | Enthesitis is a hallmark feature, indicating inflammation at tendon or ligament insertions, and is often resistant to conventional treatments. | Enthesitis = inflammation at insertion sites. |
| 20 | Which clinical feature suggests the presence of psoriatic arthritis rather than rheumatoid arthritis? | Involvement of the distal interphalangeal joints and the presence of psoriasis skin lesions suggest psoriatic arthritis. | DIP joints and skin clues. |
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