• Lakshmi Vas and Renuka Pai.
• Ashirvad Institute for Pain Management and Research, Mumbai, India.
• Pain Physician. 2016 Jan 1; 19 (1): E227-34.

AimTo report the presentation of complex regional pain syndrome-1 (CRPS-1) as deQuervain's stenosing tenosynovitis (DQST).Case ReportA 24-year-old woman presented with 3-year history of clinical diagnostic criteria (CDC) of CRPS-1. Conservative and surgical treatment for this as DQST had failed to relieve her. We diagnosed the problem as CRPS-1with CDC as inflammatory manifestations of a mechanical tendinoses of all her 5 digital tendons caused by movement of the fingers and hand tethered by agonist (flexor)/ antagonist (extensor) muscles in co-contraction. Ultrasound guided dry needling (USGDN) relaxed the muscles, replacing the abnormal agonist/antagonist co-contraction with normal agonist/antagonist coordination. Resolution of tendinoses reversed the inflammation causing the CDC. Six months later she leads normal personal and professional life, with reduction of scores of painDetect (from 21 to 5), Patient Health Questionnaire (from 13 to 4), Disability of arm, shoulder and hand from 70.8 to 25 and reversal of muscle abnormality characteristic of CRPS-1 on Musculoskeletal Ultrasonography (MSKUSG).ConclusionWe believe the primary pathology of CRPS-1 to be co-contraction of agonist (flexor)/antagonist(extensor) muscles of digits resulting in tendinoses akin to DQST. CDC of CRPS are actually inflammatory manifestations of tendinoses amenable to reversal by USGDN which also addresses the disability, a hallmark of CRPS.

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