Systemic diseases reported in association with relapsing polychondritis

Disease categories	Subtypes
Systemic vasculitis	ANCA-associated vasculitis, aortitis, Behçet's disease, hepatitis C, polyarteritis nodosa
Rheumatoid arthritis	Seropositive rheumatoid arthritis, juvenile idiopathic arthritis
Systemic autoimmune rheumatic diseases ("connective tissue diseases")	Systemic lupus erythematosus, Sjögren's syndrome, systemic sclerosis
Spondyloarthritis	Ankylosing spondylitis, reactive arthritis, psoriatic arthritis
Hematologic diseases	Myelodysplastic syndrome, lymphoma
Gastrointestinal diseases	Inflammatory bowel disease, primary biliary cirrhosis
Miscellaneous inflammatory disorders	Sweet syndrome, retroperitoneal fibrosis, meningoencephalitis, familial Mediterranean fever, sarcoidosis, immune restoration with antiretroviral therapy for HIV infection

ANCA: antineutrophil cytoplasmic antibody; HIV: human immunodeficiency virus.

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