Internal Medicine and Cross-Cutting Content in Rheumatology
Why This Domain Matters
The rheumatology exam expects you to manage the whole patient, not just the joint. Many questions test how systemic disease and its treatments interact with other organ systems, and how common internal medicine problems present differently in rheumatologic patients.
Concepts to Master
Infection risk and screening: immunosuppression (steroids, DMARDs, biologics) raises risk for TB reactivation, hepatitis B reactivation, and opportunistic infections; know baseline screening and vaccination principles. Renal disease: SLE nephritis (proteinuria, active sediment, low complement), ANCA-associated vasculitis (pulmonary-renal syndrome), and gout-related CKD require coordinated care. Cardiopulmonary: RA and SLE increase atherosclerotic risk and can cause interstitial lung disease, pleuritis, and pericarditis; scleroderma brings pulmonary arterial hypertension and interstitial lung disease. Hematologic and oncologic: cytopenias in SLE, Felty syndrome, and paraneoplastic rheumatologic syndromes. Endocrine/metabolic: gout and metabolic syndrome, steroid-induced hyperglycemia and osteoporosis.
Traps
Questions often test drug safety in context: methotrexate requires folate and monitoring of liver and marrow; NSAIDs and CKD or heart failure; hydroxychloroquine and retinal toxicity; chronic steroids and bone protection. Another trap is attributing a new symptom to the known rheumatologic disease when it reflects a complication or a second process (e.g., infection masquerading as a flare).
Worked Example
A patient with SLE on chronic steroids presents with fever and a swollen knee. The tempting answer is "lupus flare." The safer reasoning: steroids blunt fever and mask infection, so aspirate and culture and consider infection before escalating immunosuppression. Rule of thumb: new fever on immunosuppression = exclude infection first.
Practical Integration
Coordinate with nephrology, cardiology, and infectious disease; address bone health, vaccinations, and cardiovascular risk as part of routine rheumatologic care.