Successful surgical repair of thoracic outlet syndrome in patient affected by clavicular pseudoarthrosis and chronic sternoclavicular dislocations following traumatic clavicle fracture: a case report

Thoracic outlet syndrome (TOS) secondary to chronic sternoclavicular (SC) joint pseudoarthrosis is a rare but clinically significant condition. We report the case of a 50-year-old male who developed chronic SC joint instability and neurogenic TOS 2 years after a conservatively treated SC fracture. Preoperative Doppler ultrasound showed dynamic venous outflow impairment. Surgical treatment included clavicular calloclasia, adhesiolysis, anterior scalenectomy, SC joint reduction and fixation, and anchorage stabilization. At 2-month follow-up, the patient achieved complete pain relief, full functional recovery, and resolution of neurological and vascular symptoms. Early surgical management can restore stability and prevent neurovascular complications.