Handbook of Rheumatology

From First Positive Antibody to Definitive Diagnosis and Treatment - Before the Patient Leaves the Room Built for the rheumatology fellow reading the ANA panel, the resident staring down an acutely swollen knee, and the practicing rheumatologist deciding whether a stable patient’s pain reflects flare or something else entirely, this reference connects the immunopathogenesis of autoimmune and inflammatory disease - innate versus adaptive immune dysregulation, autoantibody generation, cytokine-driven inflammation, central sensitization - directly to the diagnostic and treatment decisions made at the bedside. It moves from foundational clinical evaluation and laboratory interpretation through inflammatory and crystal arthritis, systemic autoimmune connective tissue disease, vasculitis, metabolic and infectious mimics, autoinflammatory syndromes, and centralized pain, closing each pattern with the specific clinical decision it demands. Every disease entity is built around a five-part Serologic Resolution callout - presentation, serologic key, resolution, trap logic, and decision anchor - and consolidated in a cross-referenced diagnostic atlas for rapid lookup on call or in clinic. From First Presentation to Confirmed Diagnosis, You Will Distinguish inflammatory from mechanical joint pain - stiffness duration, exam pattern, and ultrasound synovitis findings that end unnecessary workups before they start. Match autoantibody subset to treatment - anti-CCP titer, ANCA specificity, and myositis-specific antibodies each mapped to the biologic they predict. Resolve the acute hot joint - synovial fluid analysis that separates septic arthritis from gout, and confirms when both coexist. Recognize vasculitis emergencies by vessel size - visual loss in giant cell arteritis, pulmonary-renal syndrome in ANCA-associated disease, each with a treat-before-biopsy pathway. Catch the mimics - autoinflammatory periodic fevers, macrophage activation syndrome, sarcoidosis, and IgG4-related disease before they’re mistaken for malignancy or infection. Separate centralized pain from active disease - fibromyalgia and complex regional pain syndrome distinguished from undertreated flare. Navigate the Serologic Resolution Atlas - every pattern indexed by presentation, differential, and chapter cross-reference for point-of-care recall. Equip your practice with the reasoning behind every diagnosis you’ll make this year.