Diagnosis of Calcium Pyrophosphate Deposition (CPPD) Disease at the Wrist
Diagnostic Approach
- Conventional radiography should be the first imaging modality used when CPPD is suspected at the wrist, according to the Annals of the Rheumatic Diseases 1, 2
- Standard radiographic examination should include posterior-anterior and lateral views in neutral position, supplemented by oblique views, as recommended by Praxis Medical Insights 3
- Ultrasound is recommended as a complementary imaging modality with significantly higher sensitivity than radiography for detecting CPPD crystals, as stated by the Annals of the Rheumatic Diseases 1, 4
- Standard ultrasound examination of the wrist should include dorsal transverse scans, dorsal longitudinal scans, and volar transverse and longitudinal scans, as described by the Annals of the Rheumatic Diseases 4
- High-frequency transducers (10 MHz or higher) should be used to detect even minor crystal deposits, according to the Annals of the Rheumatic Diseases 4
- The patient should be positioned in a sitting position with the hand on top of the thigh or on an examining table, as recommended by the Annals of the Rheumatic Diseases 4
Diagnostic Algorithm
- The diagnostic algorithm should begin with conventional radiography of the wrist, followed by ultrasound examination if radiography is negative or equivocal, and synovial fluid aspiration and analysis for definitive diagnosis, as outlined by the Annals of the Rheumatic Diseases 1, 2
- If joint aspiration is difficult, ultrasound guidance should be used, as recommended by the Annals of the Rheumatic Diseases 1
- Patient information, including medical history, physical examination, and laboratory findings, should always be considered alongside imaging findings, as stated by the Annals of the Rheumatic Diseases 1