International collaborative · est. 2026
TOSIC brings together the surgeons, neurologists, radiologists, physiotherapists and researchers who treat thoracic outlet syndrome, so that diagnosis, treatment and reporting follow the same standard wherever the patient is seen.
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Membership is open to clinicians and researchers involved in TOS care. Applications are reviewed by the membership committee.
Propose a multicenter study, ask about registry data, or talk to the research team about a study idea.
Lectures, operative videos, imaging protocols and diagnostic algorithms, indexed by topic and reviewed by the education committee.
One anatomical corridor, three diseases
Everything the collaborative publishes — registry fields, case discussions, consensus statements and education — is separated along these three lines, so that data from one center can be compared with data from another.
By far the most common form. Pain, paraesthesia and weakness in the arm and hand, typically worse with overhead or sustained activity. Diagnosis rests on history, examination and the exclusion of other causes rather than on a single test.
Presents with arm swelling, heaviness and bluish discolouration, often after repetitive effort. May develop into effort thrombosis (Paget–Schroetter syndrome), where the timing of thrombolysis and decompression is decisive.
The least common and the most urgent. Usually associated with a bony anomaly such as a cervical rib, and may present with ischaemia, coldness, claudication of the arm or distal embolisation.
Find a TOS center
Every listed center has been reviewed by the collaborative and publishes its team, services and contact details. Patients and referring physicians can search the map directly; centers can apply to be listed.
Membership
Members gain the private document library, case discussions, the member directory, the education library, research participation and a downloadable membership certificate. Applications are reviewed individually.
Have a question?
AI-written answers drawn only from TOSIC’s guidelines and patient information, in your own language. Not a diagnosis or medical advice. If your arm or hand suddenly swells, turns cold, pale or blue, or you have chest pain, seek emergency care now. Please do not type personal details.
Write to the collaborative office at info@tosicollaborative.org. For membership, research, the registry or press, the contact page lists the right address.
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