Sarcoidosis with polyarthritis in a child.
D000367:Age Factors; D001168:Arthritis / Q000150:complications*; D006099:Granuloma / Q000473:pathology; D006801:Humans; D007223:Infant; D007596:Joints; D007719:Knee Joint; D008297:Male; D012507:Sarcoidosis / Q000150:complications* / Q000473:pathology; D012867:Skin / Q000473:pathology