60 yrs.o In CPPD arthropathy, CPPD deposition occurs in articular tissues. It can present in any of the following three forms-Asympatomatic chondrocalcinosisAcute synovitis - PseudogoutChronic pyrophosphate arthropathyo The radiologic hallmark of CPPD is "chondrocalcinosis". Chondrocalcinosis is seen as punctate and/or linear radiodense deposits in fibrocartilaginous joint menisci or articular hyaline cartilage,o Definitive diagnosis is made by synovialfluid polarised light microscopy which shows weakly positive, birefringent, rhomboid crystals of CPPD. o In acute synovitis form, leucocytosis (thousands to 1 lac cells/ 1) is seen in synovial fluid examination,o It may be associated with certain underlying disease such as -Primary hyperparathyroidismHemochromatosisHypomagnesemiaHypophosphatasiaHypothyroidism">