Ultrasound Findings in de Quervain's Tenosynovitis: A Case-Based Review

De Quervain's tenosynovitis manifests on ultrasound as a thickened retinaculum, tendon sheath fluid, and hypervascularity of the EPB and APL tendons in the first extensor compartment, typically in middle-aged women with radial-sided wrist pain.

• This educational lecture reviews the sonographic appearance and clinical context of de Quervain's tenosynovitis, the second most common hand entrapment tendinopathy.
• Ultrasound reliably visualizes tendinosis, peritendinous fluid, and a thickened retinaculum, often with hyperemia on power Doppler correlating with a positive Finkelstein maneuver.
• Limitation: The content is a radiology lecture, not a peer-reviewed study, and does not provide original sensitivity or specificity data.

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