From Recurrent Fevers to Targeted Therapy: A Practical Framework for Suspected Autoinflammatory Disease

Autoinflammatory diseases sit at the intersection of innate immune dysregulation, genetics, and clinical pattern recognition. For busy clinicians, the challenge is moving from “recurrent inflammation” to a focused differential, efficient workup, and timely referral—without over-testing or missing red flags. This post outlines a pragmatic approach you can adapt to your setting and share with your team. 1) Start with the pattern, not the label Before ordering extensive panels, define the inflammatory pattern across time, systems, and triggers. A short, structured history often narrows the differential more than a broad laboratory screen.

• Episode features: onset age, duration, periodicity, complete vs incomplete recovery between flares
• Core inflammatory signs: fever, serositis, rash morphology, oral/genital ulcers, arthritis/enthesitis, ocular inflammation
• Triggers: infections, cold exposure, stress, menses, vaccines, exertion
• Family history and ancestry: consanguinity, similar symptoms, known variants
• Medication response: corticosteroids, colchicine, IL-1 blockade, NSAIDs

2) Rule out “mimics” early and explicitly Many conditions present with recurrent inflammation but require different pathways and urgency. Consider documenting a brief “mimic check” in your note to support clinical reasoning and continuity across teams.

• Infection: occult bacterial foci, endocarditis risk, chronic viral infections, travel-related exposures
• Malignancy: hematologic disease, unexplained cytopenias, constitutional symptoms out of proportion to inflammation
• Autoimmune disease: evolving connective tissue disease, vasculitis, inflammatory bowel disease
• Drug reactions: periodic symptoms temporally linked to new therapies

3) Use a “minimum effective” baseline workup A focused baseline helps confirm objective inflammation, assess organ involvement, and create a reference point for future flares. Tailor to local practice and patient context.

• Inflammation: CRP, ESR (ideally during flare and in remission)
• Hematology/chemistry: CBC with differential, CMP
• Urinalysis: protein/hematuria (screen for renal involvement and amyloidosis risk where relevant)
• Ferritin: particularly when systemic hyperinflammation is suspected
• Targeted tests: guided by phenotype (e.g., stool calprotectin, complement, immunoglobulins)

Tip: Ask patients to keep a simple flare diary (date, temperature, symptoms, medications, response). It improves diagnostic clarity and supports shared decision-making.

4) Decide when genetics is high-yield Genetic testing is most informative when paired with a well-described phenotype. Consider testing when onset is early, episodes are stereotyped, there is a strong family history, or the clinical picture suggests a monogenic syndrome. When ordering panels, document the phenotype and key negatives; it improves variant interpretation and downstream care. 5) Identify referral and escalation signals Escalate promptly when there is concern for organ-threatening inflammation or systemic hyperinflammation. Early collaboration with rheumatology/immunology can shorten time to diagnosis and reduce cumulative steroid exposure.

• Red flags: persistent cytopenias, hepatosplenomegaly, neurologic symptoms, severe serositis, progressive renal findings, growth failure in pediatrics
• High-burden disease: frequent flares, incomplete recovery, steroid dependence
• Uncertain diagnosis: recurrent objective inflammation without a clear unifying explanation

How Autoinflammatory Network can help Autoinflammatory Network is built for clinicians who want practical, evidence-informed support and peer connection. Members can access curated resources, educational updates, and opportunities for case-based discussion to improve diagnostic confidence and patient outcomes.

Interested in collaborating or sharing a case discussion topic? Join the Network and connect with peers working across rheumatology, immunology, and allied specialties. Suggested next steps (for your clinic team)

• Adopt a standardized flare history template in your EHR
• Define a baseline lab set for recurrent inflammation and a “flare set” for active episodes
• Create a referral pathway for suspected monogenic disease or steroid-dependent inflammation
• Share one challenging case per month for peer discussion and learning