To report a case of neurogenic thoracic outlet syndrome (nTOS) associated with subclavius muscle atrophy and to evaluate the efficacy of ultrasound-guided hydrodissection in improving symptoms.
Key Findings:
Electrodiagnostic studies showed persistent proximal motor slowing of the right ulnar nerve.
Ultrasonography revealed marked atrophy of the right subclavius muscle.
Post-procedural assessment indicated greater than 70% improvement in paresthesia, with subtle motor improvement.
Complete resolution of symptoms and full motor strength recovery were achieved after six treatment sessions.
Interpretation:
Ultrasonography identified subclavius muscle atrophy as a potential compressive factor in nTOS, and ultrasound-guided hydrodissection resulted in significant clinical improvement, suggesting a need for further exploration of this treatment modality.
Limitations:
This is a single case study, limiting generalizability.
Further studies are needed to confirm efficacy, refine patient selection criteria, and assess long-term outcomes.
Conclusion:
Ultrasound-guided hydrodissection may be a feasible treatment option for selected patients with refractory nTOS associated with subclavius muscle atrophy, warranting further investigation.
