Thoracic Outlet Syndrome
Robotic Keyhole Decompression, London

Thoracic outlet syndrome (TOS) is a group of conditions caused by compression of the nerves and/or blood vessels as they pass through the thoracic outlet — the narrow space between the collarbone and the first rib. Depending on what is compressed, it affects the brachial plexus (the nerves to the arm), the subclavian artery, or the subclavian vein.

Most people have never heard of it, yet the symptoms — arm pain, tingling, numbness, weakness, sometimes swelling or colour change in the hand — are common reasons to see a doctor. The difficulty is not that TOS is untreatable; it is that the symptoms overlap with far more familiar problems, so the right diagnosis, and the right specialist, are often reached late.

Conservative treatment is always the starting point. Where it does not resolve the problem and the compression is confirmed, the definitive treatment is surgical decompression — and, as the next sections explain, that operation is a thoracic one. Shoulder, arm & hand pain page →

TOS is not one condition but three, and they behave very differently:

• →Neurogenic TOS (the nerves) — by far the most common, around 95 per cent of cases. It causes pain, numbness, tingling and weakness in the arm and hand, typically worse with overhead activity, carrying loads, or sustained arm use.
• →Venous TOS (the subclavian vein) — roughly 4 per cent. It causes arm swelling, a heavy feeling, and a bluish discolouration, sometimes after vigorous arm use.
• →Arterial TOS (the subclavian artery) — the least common, around 1 per cent, but the most serious. In severe cases it can threaten the blood supply to the arm and needs urgent assessment.

Neurogenic TOS is most common in younger adults, often between 20 and 40, and is reported more frequently in women than men. Knowing which form is present matters, because it changes both the urgency and the treatment — which is part of what a specialist assessment establishes (Sanders & Hammond; Society for Vascular Surgery reporting standards, 2016).

TOS is diagnosed clinically — from the story and the examination — supported by tests. This matters because there is no single scan that proves neurogenic TOS, and the symptoms overlap with cervical spine disease, rotator cuff problems, carpal tunnel syndrome and peripheral neuropathy.

The discriminating examination findings are specific and reproducible. The elevated arm stress test (the Roos test, holding the arms up and opening and closing the hands) reproduces the symptoms in TOS; Adson’s test assesses the pulse with the arm and neck positioned to narrow the outlet. These are supported by nerve conduction studies, and by imaging — including assessment for a cervical rib or other bony anomaly, and vascular imaging where a venous or arterial cause is suspected.

The point for a patient who has been passed between specialists is this: the examination findings in TOS are real and testable. A focused assessment can usually establish whether the thoracic outlet is the source — rather than leaving the problem as “unexplained” arm pain.

Patients with TOS frequently describe years of being investigated for the wrong thing — an MRI of the neck, a shoulder injection, a wrist splint for presumed carpal tunnel — before the thoracic outlet is considered. There are two reasons for this.

The first is symptom overlap: arm and hand symptoms point naturally towards the neck, shoulder or wrist, all of which are common and familiar. The second is structural: TOS sits at the boundary between several specialties, and the patient is often routed to whichever one the dominant symptom suggests, rather than to the place the compression actually is. Neither reflects poor care — the conditions it mimics are genuinely more common.

The practical message is that persistent arm, neck or hand symptoms that have not been explained by neck or wrist assessment, particularly if they are worse with overhead activity, are worth assessing specifically for a thoracic outlet cause.

Here is the part that reframes the whole condition. The operation that relieves TOS is removal of the first rib — and the first rib is part of the chest. The decompression is, anatomically, a thoracic operation.

In the UK, TOS surgery has traditionally been performed by vascular or general surgeons, often through an incision under the arm (transaxillary) or above the collarbone (supraclavicular). Many do excellent work by these routes, and this page is not a criticism of them. But the structure being removed is thoracic, and that is precisely what makes a robotic keyhole approach through the chest a natural fit: a thoracic surgeon, operating on a thoracic structure, with the magnification and access the robotic platform provides.

TOS surgery is highly specialist and carried out at only a small number of UK centres. Dr Okiror offers robotic keyhole first rib resection at London Bridge Hospital, after full assessment and only where conservative treatment has not resolved the problem.

Where surgery is indicated, Dr Okiror performs robotic first rib resection through small keyhole incisions rather than an open cut. The robotic platform gives a magnified, stable, three-dimensional view of the first rib and the nerves and vessels around it, and allows the rib to be removed and the outlet decompressed with precision in a confined space.

The honest case for the robotic approach rests on recovery, not on a claim of better long-term outcomes. The traditional open routes — transaxillary and supraclavicular — are well established and effective in experienced hands. The robotic approach offers smaller incisions and, for many patients, a quicker return to normal activity. The published robotic experience is still relatively small (for example, Burt & Palivela, J Thorac Cardiovasc Surg 2019), so it is described here as a genuinely promising option rather than a proven improvement on results.

Outcomes in Dr Okiror’s initial robotic series have been encouraging. That is stated deliberately modestly: the numbers are early, and a careful surgeon does not over-claim from a small series. What can be said with confidence is that the decompression is achieved, and that the keyhole route spares the larger wound of the open approaches.

Most patients stay in hospital for about 2 to 3 days after robotic first rib resection. Return to desk-based work is typically possible within 2 to 3 weeks; heavier and overhead work takes longer.

Physiotherapy is an important part of recovery, restoring movement and posture around the shoulder girdle once the outlet has been decompressed. Nerve symptoms that have been present for a long time can take time to settle even after successful surgery, and Dr Okiror will set out a realistic timeline for your particular situation — including what to expect in the first weeks and when to resume specific activities — before you leave hospital.

For a condition where surgery is appropriate, decompression is effective at relieving the compression, and the published surgical literature — built largely on open transaxillary and supraclavicular series over several decades (Roos; Sanders & Hammond; Illig et al., J Vasc Surg 2016) — supports good symptom relief in well-selected patients. The robotic approach aims to deliver the same decompression with an easier recovery.

As with any operation around the thoracic outlet, there are risks, and they are discussed in full before any decision: injury to the nearby nerves or blood vessels (uncommon in experienced hands), a small pneumothorax, bleeding or infection, and incomplete relief or recurrence of symptoms in a minority. Long-standing nerve symptoms may not resolve completely. Setting these out plainly — alongside the realistic, modestly framed benefit — is how an informed decision is made.

Surgery is never the first step. The great majority of people with neurogenic TOS are managed without an operation, and conservative treatment is always tried first.

This usually means a structured course of physiotherapy focused on posture and the muscles around the shoulder girdle, activity modification to avoid the positions that provoke symptoms, and, where relevant, addressing contributing factors. Surgery is considered only when a confirmed, significant compression has not responded to a proper trial of conservative management — or, in the uncommon arterial and venous forms, where the vascular problem itself requires it. A specialist assessment is about establishing which of those situations applies.

Assessment and surgery for thoracic outlet syndrome are covered by the major insurers, subject to the terms of your individual policy. Recognised by BUPA, AXA Health, Aviva, WPA, Cigna and BUPA International. Self-funding patients are also welcome, with transparent quotes provided in advance.

To confirm your specific cover, contact Jo Mitchelson, PA, on 020 7952 2882 or pa@lungsurgeon.co.uk.