Trigger digits and de Quervain's disease are the 2 most common forms of tenosynovitis tendinopathy.
Diagnosis is usually clinical.
If required, the single most useful and accurate investigation is a high-resolution ultrasound scan.
Treatment may involve non-steroidal anti-inflammatory drugs (NSAIDs), splinting, corticosteroid/local anaesthetic injections, or surgery.
Tenosynovitis of the hand and wrist is a group of entities with a common pathology involving the extrinsic tendons of the hand and wrist and their corresponding retinacular sheaths. They usually start as tendon irritation manifesting as pain, and can progress into catching and locking when tendon gliding fails. 
Department of Orthopaedic Surgery and Rehabilitation
University of Chicago Hospitals
JMW receives research funding from the US Department of Defense and American Society for Surgery of the Hand. She receives a salary as deputy editor of Journal of Hand Surgery and updates editor of the textbook Skeletal Trauma.
Dr Jennifer Moriatis Wolf would like to gratefully acknowledge Dr Doug Campbell, Dr Peter Evans, and Dr Shafic Sraj, the previous contributors to this monograph. DC, PE, and SS declare that they have no competing interests.
Assistant Professor of Orthopedic Surgery
Harvard Medical School
Brigham and Women's Hospital
PEB declares that he has no competing interests.
Director and Head
Department of Plastic, Hand and Reconstructive Microsurgery and Burns
SRS declares that he has no competing interests.
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