PT  - JOURNAL ARTICLE
AU  - Sébastien Ottaviani
AU  - Pierre-Antoine Juge
AU  - Aurore Aubrun
AU  - Elisabeth Palazzo
AU  - Philippe Dieudé
TI  - Sensitivity and Reproducibility of Ultrasonography in Calcium Pyrophosphate Crystal Deposition in Knee Cartilage: A Cross-sectional Study
AID  - 10.3899/jrheum.141067
DP  - 2015 Aug 01
TA  - The Journal of Rheumatology
PG  - 1511--1513
VI  - 42
IP  - 8
4099  - http://www.jrheum.org/content/42/8/1511.short
4100  - http://www.jrheum.org/content/42/8/1511.full
SO  - J Rheumatol2015 Aug 01; 42
AB  - Objective. To compare the ability to detect calcium pyrophosphate (CPP) crystals deposition (CPPD) in knee cartilage by ultrasonography (US) and radiography.Methods. Patients with knee effusion were consecutively included and underwent radiography and US evaluation of knees. Diagnosis of CPPD was made by the identification of CPP crystals. Two blinded rheumatologists performed US assessment.Results. We included 51 patients (25 with CPPD). US revealed hyperechoic spots in all 25 patients with CPPD (sensitivity 100%, specificity 92.3%), whereas radiography revealed CPPD in 16 (sensitivity 64%, specificity 100%; p < 0.0001).Conclusion. US of knees is more sensitive than radiography for CPPD diagnosis.