Table 2.

Diseases that can mimic rheumatoid arthritis

Viral polyarthritis

Rubella

Parvovirus

Hepatitis C

Hepatitis B

Alphaviruses

Human T lymphotrophic virus type 1)

Systemic rheumatic diseases

Systemic lupus erythematosus

Sjögren’s syndrome, dermatomyositis)

Palindromic rheumatism

Hypermobility syndrome

Fibromyalgia

Spondyloarthropathy

Reactive arthritis

Arthritis of inflammatory bowel disease

Psoriatic arthritis

Polymyalgia rheumatic

Infectious arthritis

Lyme arthritis

Crystalline arthritis

Osteoarthritis

Paraneoplastic disease

Sarcoid arthritis