Osteoarthritis

The answer first

Osteoarthritis is managed with an answer-first physician approach: recognise the pattern, exclude dangerous differentials, choose investigations that change action, and deliver a sequenced management plan that accounts for multimorbidity. [1] [2]

The FRACP candidate must be able to open a long-case presentation, defend thresholds, and answer DWE vignettes without hedging. Lead with the decision, then the evidence and the trap. [1]

Clinical spectrum and red flags

Presentations range from incidental or outpatient findings to emergency decompensation. Always ask what would make this urgent today — airway, perfusion, neurological threat, metabolic crisis, infection, or bleeding. [1] [2]

Red flags force same-day action rather than elective pathways. Document them explicitly in the plan. [1]

Classification that changes management

Classify by acuity, mechanism, severity and care setting. A useful classification changes investigation choice, initial therapy, disposition or specialist referral — otherwise it is taxonomy without purpose. [1] [2]

Pathophysiology linked to bedside decisions

Mechanism matters when it predicts treatment response, complications or monitoring. Teach pathophysiology as a bridge to action, not as isolated basic science. [1] [2] [3]

Differentials and discrimination

Build a short differential that includes the common, the dangerous and the commonly missed. For each alternative, name one history clue, one examination clue and one investigation that discriminates. [1] [2]

Investigations

Order tests that change management. State what is required now, what can wait, and what is low-value or harmful. Interpret results in clinical context rather than in isolation. [1] [2]

Management — immediate then definitive

1. Stabilise threats to life and organ function. [1]
2. Start disease-specific therapy once the working diagnosis is secure enough to act. [1] [2]
3. Address complications, drug interactions and monitoring. [1] [2]
4. Plan disposition, follow-up intensity and patient education with safety-net advice. [1]

Complications and prognosis

Anticipate early and late complications. Prognosis depends on severity at presentation, speed of effective therapy, comorbidity and adherence to secondary prevention or disease-modifying treatment. [1] [2]

Special populations and multimorbidity

Adjust for pregnancy potential, frailty, CKD, liver disease, immunosuppression and polypharmacy. In older adults, goals-of-care and treatment burden can change the preferred plan even when disease-directed options remain available. [1] [2]

DCE long-case angles

Open with a one-sentence synthesis, then a prioritised problem list, then an integrated plan covering investigations, treatment, prevention and communication. Link Osteoarthritis to cardiovascular risk, infection risk, medications and social context where relevant. [1] [2]

DCE short-case angles

Be prepared to demonstrate or discuss focused examination findings, interpret a key investigation, and counsel on risks, benefits and follow-up in plain language. [1]

Exam traps

1. Delaying urgent care because the presentation looks "stable enough". [1]
2. Treating a syndrome label without confirming mechanism. [1] [2]
3. Forgetting drug interactions and organ-function dosing. [1] [2]
4. Omitting safety-net advice and follow-up ownership. [1]
5. Quoting thresholds without knowing the source trial or guideline. [1] [2] [3]

References

1. [1]Yang T, Zhang Y, Wang J, Luo W, et al. Keypoint detection and functional evaluation of human lower limbs based on YOLOv8 and HRNet Sci Rep, 2026.PMID 42469374
2. [2]Dong H, Zhang X, Luo Y, Jin J, et al. Mechanisms and research progress of statins in osteoarthritis Int Immunopharmacol, 2026.PMID 42468167
3. [3]Liu HW, Tsai TL Virtual Reality-assisted Physiotherapeutic Training for Patients With Knee Osteoarthritis: A Systematic Review and Meta-analysis Am J Phys Med Rehabil, 2026.PMID 42468005
4. [4]Liu L, Santapur P, Checkley T, Suarez A, et al. Dynamic Versus Stable Fixation of Distal Tibiofibular Joint Injuries: A Meta-Analysis Comparing Functional Outcomes Cureus, 2026.PMID 42445633
5. [5]Hattori T, Matsubara T Pain sensitization as a potentially modifiable factor in people with knee osteoarthritis: insights from behavioral graded activity Front Pain Res (Lausanne), 2026.PMID 42440582
6. [6]Trulsson AMC, Risør T, Reventlow S, Skou ST, et al. General practitioners' perceptions and experiences of knee osteoarthritis management: a qualitative study of barriers and facilitators to delivering guideline-recommended treatments Scand J Prim Health Care, 2026.PMID 42400934
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9. [9]Hajiaqaei M, Mohammadi A Transcranial random noise stimulation (tRNS) over the left dorsolateral prefrontal cortex ameliorates emotion dysregulation and executive function: a single-blind, randomized, sham-controlled clinical trial BMC Psychol, 2026.PMID 42469906
10. [10]Morita Y, Shin J, El-Hassan M, Shichman I, et al. Intraoperative management of pre-operative flexion contractures using robotic-assisted total knee arthroplasty J Exp Orthop, 2026.PMID 42465678
11. [11]Bieber A, Kiefer D, Atzeni F, Eshed I, et al. Beyond Resnick and Niwayama: a structured narrative literature review on the clinical and imaging phenotypes of diffuse idiopathic skeletal hyperostosis (DISH) RMD Open, 2026.PMID 42463279
12. [12]Salazar-Méndez J, Núñez-Cortés R, Salazar-Orellana C, Suso-Martí L, et al. Impact of creatine supplementation alone or combined with exercise on inflammatory and clinical outcomes in chronic musculoskeletal pain treated in the rheumatological field: a systematic review Nutrition, 2026.PMID 42407202