Does adult-onset Still's disease (AOSD) resemble other conditions?

Does adult-onset Still's disease (AOSD) resemble other conditions?

AOSD shares the symptoms of fever, rash, and abdominal and joint pain with auto-inflammatory syndromes and autoimmune disorders. Immune systems that do not function normally cause both auto-inflammatory and auto-immune system problems. The first type of problem involves excessive swelling and soreness. Auto-immune system problems mean that your immune system, which is supposed to protect your body against illness, instead attacks healthy tissue.

Other disorders that look like AOSD include:

• Reactive arthritis (formerly known as Reiter’s syndrome), a form of arthritis.
• Inflammatory bowel disease.
• Sweet syndrome, a skin disease.
• Certain cancers like lymphoma and leukemia.
• Certain infections like tuberculosis, mononucleosis and toxoplasmosis.