title: The ground pepper sign of synovial fluid: a new diagnostic feature of ochronosis.
mesh_terms: D002114:Calcinosis / Q000000981:diagnostic imaging; D002358:Cartilage, Articular / Q000473:pathology*; D002498:Centrifugation; D002805:Chondrocalcinosis / Q000000981:diagnostic imaging; D004423:Ear; D004431:Ear, External / Q000000981:diagnostic imaging; D005260:Female; D006621:Hip Joint / Q000000981:diagnostic imaging; D006801:Humans; D007719:Knee Joint / Q000000981:diagnostic imaging; D008875:Middle Aged; D009794:Ochronosis / Q000175:diagnosis* / Q000652:urine; D010003:Osteoarthritis / Q000000981:diagnostic imaging; D010858:Pigmentation; D011859:Radiography; D012785:Shoulder Joint / Q000000981:diagnostic imaging; D013131:Spine / Q000000981:diagnostic imaging; D013582:Synovial Fluid / Q000166:cytology*