De Quervain Tenosynovitis Detected by Blood Pool SPECT/CT Using New 3D-ring CZT System.

A 58-year-old woman was referred for right wrist pain, with suspicion of stress fracture of the radial styloid. 99m Tc-HDP bone scintigraphy, using new 3D-ring CZT system, was performed. Blood pool SPECT/CT revealed intense hyperemia along the first extensor compartment of the right wrist, suggesting De Quervain tenosynovitis, while late-phase SPECT/CT showed right thumb arthritis. Ultrasound imaging confirmed De Quervain tenosynovitis. Our case highlights the potential of blood pool SPECT/CT using new 3D-ring CZT system to detect relevant extraosseous findings, especially common tendinopathies such as De Quervain tenosynovitis.