title: Crystals in joints.
mesh_terms: D002131:Calcium Pyrophosphate / Q000378:metabolism*; D003460:Crystallization; D011756:Diphosphates / Q000378:metabolism*; D006801:Humans; D006882:Hydroxyapatites / Q000378:metabolism*; D007592:Joint Diseases / Q000209:etiology*; D007596:Joints / Q000378:metabolism; D013582:Synovial Fluid / Q000378:metabolism
chemical_list: D011756:Diphosphates; D006882:Hydroxyapatites; D002131:Calcium Pyrophosphate