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Evaluation of Calcific Tendonitis of the Rotator Cuff

Role of Color Doppler Ultrasonography

Departments of Radiology (H.-J.C., Y.-H.C., C.-C.H., C.-Y.C.) and Orthopaedics (J.-J.W.), Veterans General Hospital–Taipei, School of Medicine, National Yang Ming University, Taipei, Taiwan, Republic of China; and Section of Radiology, Taipei Municipal Ho-Ping Hospital, Taipei, Taiwan, Republic of China (D.-Y.H.)

Hong-Jen Chiou, MD, Department of Radiology, No. 201, Section 2, Shih-Pai Road, Taipei, Taiwan, Republic of China.

Objective. To use color Doppler ultrasonography to evaluate the morphology and vascularity of calcific tendonitis and to predict the formative and resorptive phases of the calcification. Methods. Ninety-four patients with shoulder calcification on plain radiographs were enrolled in this study. Ultrasonography of the shoulder was focused on the rotator cuff. Color Doppler ultrasonography was applied in the calcific region. Patient symptoms were graded as painless, mild, moderate, and severe. The calcific plaques were classified as arc-shaped, fragmented or punctate, nodular, and cystic types. Color Doppler ultrasonographic signals were graded 0 to 3. The formative and resorptive phases of calcification were categorized by patient symptoms; acute onset of moderate or severe pain indicated the resorptive phase. Results. The calcific plaques appeared arc shaped in 59 patients (20 painless, 19 mild, and 20 moderate), fragmented or punctate in 27 (2 painless, 3 mild, 20 moderate, and 2 severe), nodular in 6 (1 moderate and 5 severe), and cystic in 2 (severe). There was a significant difference between the morphology of the calcific plaques and clinical symptoms (P < .01). On color Doppler ultrasonography, grade 0 signals were found in 28 patients (22 painless and 6 with mild pain); grade 1 in 18 (16 mild and 2 severe); grade 2 in 41 (all moderate); and grade 3 in 7 (all severe). The correspondence between color Doppler ultrasonographic findings and clinical symptoms was excellent (P < .01). Conclusions. High-resolution ultrasonography with color Doppler imaging could differentiate the formative and resorptive phases of the calcification and could be used as a follow-up modality in calcific tendonitis of the shoulder.

Key Words: shoulder • calcification • ultrasonography • color Doppler ultrasonography

Abbreviations: CDUS, color Doppler ultrasonography • HRUS, highresolution ultrasonography • VAS, visual analogue scale

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