Which joint is most commonly affected in pseudogout –
Correct Answer: Knee
Description: Ans. is 'a' i.e., Knee Pseudogout It is one of the forms of "Calcium pyrophosphate dihydrate" (CPPD) ahropathy. Pseudogout commonly involves the larger joints. Knee joint is most commonly involved; other sites are wrist, elbow, shoulder, ankle. Involvement of small joints is uncommon. Age group is > 60 yrs. In CPPD ahropathy, CPPD deposition occurs in aicular tissues. It can present in any of the following three forms :? 1) Asympatomatic chondrocalcinosis 2) Acute synovitis - Pseudogout 3) Chronic pyrophosphate ahropathy The radiologic hallmark of CPPD is "chondrocalcinosis. Chondrocalcinosis is seen as punctate and/or linear radiodense deposits in fibrocailaginous joint menisci or aicular hyaline cailage. Definitive diagnosis is made by synol fluid polarised light microscopy which shows weakly positive, birefringent, rhomboid crystals of CPPD.
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