الفهرس 
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Abstract
Crystals induced arthritis is a common pathology in articular and juxta-articular tissues. The types of crystals associated with joint disease include monosodium urate (MSU), calcium pyrophosphate dihydrate crystals (CPPD) and basic calcium phosphate crystals (BCP), including hydroxyapatite (HA) (OLivieri and Punzi, 2003 and Fodor et al., 2008).
Synovial fluid analysis is an accurate method for diagnosis of crystal deposition pathology and identification of crystals using polarizing microscopy (Frediani et al., 2005, Announ and Guerne, 2007 (a) and Filippou et al., 2007). High frequency ultrasonography (US) has proved to be an excellent technique for evaluation of articular and juxta-articular alterations and calcific deposits in crystal related diseases (Falsetti et al., 2003, Filippou et al., 2007, Fodor et al., 2008 and Dufauret-Lombard et al. 2010).
Power Doppler sonography (PDS) has proved to be a reliable tool for semiquantitative assessment of the vascularity of the soft tissue, estimating the presence and extent of inflammation.