title: Pressure erosions: rheumatoid arthritis or calcium pyrophosphate dihydrate crystal deposition disease?
mesh_terms: D001172:Arthritis, Rheumatoid / Q000000981:diagnostic imaging*; D002131:Calcium Pyrophosphate / Q000378:metabolism*; D002805:Chondrocalcinosis / Q000000981:diagnostic imaging; D011756:Diphosphates / Q000378:metabolism*; D005269:Femur / Q000000981:diagnostic imaging; D006801:Humans; D011859:Radiography
chemical_list: D011756:Diphosphates; D002131:Calcium Pyrophosphate