title: Massive calcium pyrophosphate crystal deposition at the craniovertebral junction.
mesh_terms: D000368:Aged; D002114:Calcinosis / Q000000981:diagnostic imaging*; D002131:Calcium Pyrophosphate; D002574:Cervical Vertebrae / Q000000981:diagnostic imaging; D011756:Diphosphates; D005260:Female; D006801:Humans; D011859:Radiography; D013122:Spinal Diseases / Q000000981:diagnostic imaging*
chemical_list: D011756:Diphosphates; D002131:Calcium Pyrophosphate