title: Tumor-like soft tissue swelling of the distal phalanx due to calcium pyrophosphate dihydrate crystal deposition.
mesh_terms: D000368:Aged; D002131:Calcium Pyrophosphate / Q000378:metabolism*; D011756:Diphosphates / Q000378:metabolism*; D005384:Finger Joint / Q000000981:diagnostic imaging / Q000648:ultrastructure; D006801:Humans; D008297:Male; D011859:Radiography
chemical_list: D011756:Diphosphates; D002131:Calcium Pyrophosphate