Arthritis - Classification

Classification

There are several diseases where joint pain is primary, and is considered the main feature. Generally when a person has "arthritis" it means that they have one of these diseases, which include:

  • Osteoarthritis
  • Rheumatoid arthritis
  • Gout and pseudo-gout
  • Septic arthritis
  • Ankylosing spondylitis
  • Juvenile idiopathic arthritis
  • Still's disease

Joint pain can also be a symptom of other diseases. In this case, the arthritis is considered to be secondary to the main disease; these include:

  • Psoriasis (Psoriatic arthritis)
  • Reactive arthritis
  • Ehlers-Danlos Syndrome
  • Haemochromatosis
  • Hepatitis
  • Lyme disease
  • Inflammatory bowel disease (Including Crohn's Disease and Ulcerative Colitis)
  • Henoch-Schönlein purpura
  • Hyperimmunoglobulinemia D with recurrent fever
  • Sarcoidosis
  • TNF receptor associated periodic syndrome
  • Wegener's granulomatosis (and many other vasculitis syndromes)
  • Familial Mediterranean fever

An undifferentiated arthritis is an arthritis that does not fit into well-known clinical disease categories, possibly being an early stage of a definite rheumatic disease.

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