AUTHOR=Qu Chenchen , Deng Heping , Lu Bo , Mi Yaru , Ye Hui , Zhu Yaru 

TITLE=Case Report: Sliding gouty tophi: a case of dynamic ultrasound diagnosis of carpal tunnel syndrome

JOURNAL=Frontiers in Surgery

VOLUME=Volume 12 - 2025

YEAR=2025

URL=https://www.frontiersin.org/journals/surgery/articles/10.3389/fsurg.2025.1503085

DOI=10.3389/fsurg.2025.1503085

ISSN=2296-875X

ABSTRACT=Carpal tunnel syndrome (CTS) caused by gouty tophi is a rare clinical condition. In this case, ultrasonography clearly identified gouty tophi deposited within the superficial flexor tendon of the right middle finger, resulting in tendon thickening. The thickened tendon was constrained by the transverse carpal ligament, leading to restricted finger movement. Additionally, when the finger was extended, the thickened tendon slid beneath the transverse carpal ligament, triggering severe symptomatic episodes of CTS. This observation provided direct evidence of the underlying etiology of CTS in this patient.