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| Calcium pyrophosphate deposition disease ： ウィキペディア英語版 |
Chondrocalcinosis
Calcium pyrophosphate dihydrate (CPPD) crystal deposition disease, also known as chondrocalcinosis, pseudogout and pyrophosphate arthropathy is a rheumatologic disorder with varied symptoms and signs arising from the accumulation of crystals of calcium pyrophosphate dihydrate in the connective tissues. The alternative names emphasize particular aspects of the clinical or radiographic findings. The knee joint is the most commonly affected.〔
==Terminology==
Calcium pyrophosphate dihydrate crystals are associated with a range of clinical syndromes, which have been given various names, based upon which clinical symptoms or radiographic findings are most prominent.〔 A task force of the European League Against Rheumatism (EULAR) made recommendations on preferred terminology.〔 Accordingly, ''calcium pyrophosphate deposition'' (CPPD) is an umbrella term for the various clinical subsets, whose naming reflects an emphasis on particular features. For example ''pseudogout'' refers to the acute symptoms of joint inflammation or synovitis: red, tender, and swollen joints that may resemble gouty arthritis (a similar condition in which monosodium urate crystals are deposited within the joints). ''Chondrocalcinosis'',〔Rothschild, Bruce M 〕〔 on the other hand, refers to the radiographic evidence of calcification in hyaline and/or fibrocartilage. "Osteoarthritis (OA) with CPPD" reflects a situation where osteoarthritis features are the most apparent. ''Pyrophosphate arthropathy'' is a term that can refer to several of these situations.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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