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PsA Domain-Based Treatment — SCE Rheumatology MCQ

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ModerateSpondyloarthropathyPsA Domain-Based TreatmentSCE Rheumatology

A 42-year-old woman has psoriatic arthritis with persistent active peripheral synovitis of the hands and wrists despite 6 months of methotrexate 25 mg weekly. She also has clinically significant plaque psoriasis affecting the scalp and elbows, and Crohn disease that is currently quiescent on azathioprine. A biologic or targeted synthetic DMARD is now being considered. According to British Society for Rheumatology guidance, which approach should determine the choice of advanced therapy?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: ASelect by integrating the active disease domains, associated conditions and comorbidities, prior therapy, and the patient's goals and preferences

Explanation lettering: D = shown as A · E = shown as B · A = shown as C · C = shown as D · B = shown as E

D is correct. BSR 2022 structures PsA treatment around the active domains — peripheral arthritis, axial disease, enthesitis, dactylitis and psoriasis — combined with associated conditions and comorbidities, previous drug exposure, and shared decision-making about patient goals. Here all three of peripheral synovitis, significant psoriasis and inflammatory bowel disease must shape the choice: IL-17 inhibition is avoided in active Crohn disease and used only cautiously with gastroenterology input when quiescent, whereas monoclonal TNF inhibitors or IL-12/23–IL-23 blockade cover both joints and gut/skin. A is wrong because skin severity is only one domain. B is false: classes differ materially by domain and by extra-articular disease. C ignores a comorbidity that changes drug safety. E inverts the hierarchy — cost may decide only between equally suitable, phenotype-appropriate options.

Reference: Tucker L, et al. Executive summary: The 2022 British Society for Rheumatology guideline for the treatment of psoriatic arthritis with biologic and targeted synthetic DMARDs. Rheumatology (Oxford) 2022;61(9):3514–3520 — recommendations by disease domain and on choice of therapy. https://pubmed.ncbi.nlm.nih.gov/35640653/