Sonographic findings of rotator cuff calcifications.

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Abstract
We studied the findings and value of sonography in the diagnosis of rotator cuff calcifications in comparison to plain radiographs. Sonograms were correlated with plain radiographs in 951 patients. The diagnosis of rotator cuff calcifications was made by ultrasonography in 87 and with plain films in 93 of 951 patients. Sonography displayed two additional bursal slurry calcifications were found on plain films. Three types of calcifications were found with ultrasonography: (1) a hyperechoic focus with a well-defined shadow (79%); (2) a hyperechoic focus with a faint shadow (14%); and, (3) a hyperechoic focus with no shadow (7%). Large and slurry calcifications and bursal calcifications were better seen with ultrasonography, but small and more scattered deposits were better found on plain radiographs. Sonography proved to be reliable in the detection and localization of rotator cuff calcifications, but classification into a formative or resorptive phase could not be done. Because of this and the possibility of pathologic conditions of bone, plain radiographs should always be obtained prior to doing sonography.

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