Framing
- Rheumatological arthritis classification separates inflammatory (rheumatoid arthritis, seronegative spondyloarthropathies), crystal-associated (gout, pseudogout), degenerative (osteoarthritis), and infective (septic arthritis) causes - each with a distinct joint fluid/serological signature and treatment approach, making synovial fluid analysis (when a joint effusion is present) one of the highest-yield investigations across this whole topic
- Acute monoarthritis always requires excluding septic arthritis as the first priority, since missed joint sepsis causes rapid, irreversible cartilage destruction
What sits under this topic
- See for the acute presentation and initial diagnostic approach
- See for the prototypical inflammatory polyarthritis
- See for crystal arthropathy
- See for degenerative joint disease
- See for the joint sepsis emergency
- See for the HLA-B27-associated inflammatory arthritis group
2 of 2 sections written · drafted 2026-09-14