Some of the less common causes of polyarthritis.
D001172:Arthritis, Rheumatoid / Q000209:etiology*; D001847:Bone Diseases / Q000150:complications; D006801:Humans; D006949:Hyperlipidemias / Q000150:complications; D008875:Middle Aged; D010859:Pigmentation Disorders / Q000150:complications; D012507:Sarcoidosis / Q000150:complications