First-rib removal for TOS: why the full decompression plan matters

By: Dr. Kamran Aghayev

Last updated November 3, 2026 · Spotted a mistake? Tell us

Removing the first rib can create more space for the nerves and blood vessels compressed in thoracic outlet syndrome (TOS). But “first-rib resection” does not describe everything an operation involves. Many procedures also release tight muscles or fibrous bands and free the affected nerves. The useful question is whether the proposed treatment addresses the structures responsible for your symptoms, and what recovery can realistically bring.^{1, 2}

This page is mainly about neurogenic TOS, where the brachial plexus (the nerves running from the neck into the arm) is affected. Arterial and venous TOS are different problems. They may need treatment of a damaged artery or a clot as well as decompression, sometimes urgently. Sudden swelling or bluish discoloration of the arm, or a cold, pale, painful hand, needs urgent medical care where you are.¹

In this guide: What rib removal does · The rest of the plan · Does everyone need it? · Symptoms after surgery · Outcomes · Dr. Aghayev’s approach · Questions to ask

What removing the first rib is meant to do

The first rib is the short, curved rib just below the collarbone. The brachial plexus and the subclavian artery pass over it, between two neck muscles (the anterior and middle scalenes); the subclavian vein passes over it just in front of them. Where these structures are crowded, by the rib, by an extra (cervical) rib, by muscle or by fibrous bands, they can be compressed, especially with the arm raised.^{2, 3}

“Thoracic outlet decompression” is the aim of surgery: relieving that compression. “First-rib resection” names one possible step. In practice, operations described as first-rib resection commonly include removing or releasing part of the scalene muscles, cutting fibrous bands and freeing the nerves from surrounding tissue (neurolysis). The name on a consent form rarely tells the whole story.^{1, 2}

Why the rest of the plan matters

Compression in neurogenic TOS can come from more than one place. The main sites are the triangle between the scalene muscles, the space between the collarbone and the first rib, and, further down, the space beneath the pectoralis minor muscle at the front of the shoulder. Not everyone has compression at every site, and not every site needs treatment.^{3, 9}

Which structures are involved is established before surgery, from the history, examination and tests chosen for the question. The diagnosis itself is clinical; no single scan or test settles every case. Our page on thoracic outlet syndrome diagnosis explains how it is assessed.³

A plan built on that assessment explains what will be removed or released and why. Two patients described as needing “first-rib resection” may need quite different operations.

Step	What it aims to do
Removing the first rib (and a cervical rib, if present)	Create space where bone contributes to compression
Releasing or removing part of the scalene muscles, and cutting fibrous bands	Relieve soft-tissue compression around the nerves and artery
Freeing the nerves (neurolysis)	Release the brachial plexus from tissue that tethers or compresses it
Releasing the pectoralis minor tendon	Treat compression beneath that muscle, in selected patients

Does everyone with neurogenic TOS need the rib removed?

There is no single answer that fits every patient. An international expert consensus did not agree that the first rib should be removed routinely in neurogenic TOS, and surgeons use both rib-removing and rib-sparing operations in selected patients.³

Many people start with physiotherapy and changes to the activities that bring on symptoms, and some improve enough to avoid surgery. Surgery is usually considered when symptoms stay disabling despite that care, or earlier when there is significant weakness or muscle wasting. In a randomized trial of patients whose symptoms had not responded to conservative care, an operation (transaxillary thoracic outlet decompression) improved arm function more than continuing conservative treatment over three months.^{3, 4, 5}

The comparison between rib removal and rib preservation is less settled. A small randomized trial published in 2005, in patients whose main problem was pain, found better results with transaxillary first-rib resection than with the particular rib-sparing nerve release it tested. Large later series and reviews report good results from selected rib-sparing operations, which typically remove scalene muscle, free the nerves and sometimes release the pectoralis minor. Those studies differ in the patients selected, the operations performed and how long people were followed, so they cannot rank one approach above the other for everyone.^{6, 7, 8}

What this means for you: the choice should follow from your own findings. A surgeon should be able to explain why removing or keeping the rib suits your case. More extensive surgery is not automatically better, and a smaller operation is not automatically safer.

Why symptoms can remain or return after surgery

Some symptoms never improve after an operation (persistent symptoms); others improve and later come back (recurrence). Pain and stiffness during the first weeks and months of recovery are expected and are not, on their own, a sign that the operation failed. When symptoms do remain or return, there are several possible explanations, and they lead to different decisions:^{10, 11}

Compression that is still there. Part of the rib, scalene muscle or a band may still press on the nerves. In people referred for repeat surgery, residual scalene muscle and retained rib were common findings. That is a selected group, so it does not show how often first operations fail.¹⁰
Scar tissue. Scar can form around the nerves and tether them, even after an operation that removed the rib completely. In one large series, repeat nerve release for scar after an anatomically complete first operation improved function in many patients.¹¹
Another diagnosis. A neck, shoulder or nerve condition can coexist with TOS or explain symptoms that surgery did not relieve.
Nerve damage that recovers slowly or incompletely. When weakness and muscle wasting are established before surgery, decompression can relieve pain without fully restoring strength.¹³

A piece of rib left after surgery is not, by itself, the explanation. In a long-term follow-up of first-rib resections, the length of the remaining rib was not related to how people were doing years later. Equally, removing the whole rib cannot guarantee that symptoms will never return.^{11, 12} The page on persistent and recurrent thoracic outlet syndrome covers reassessment after surgery in more detail.

What the evidence can tell you about outcomes

Studies measure different things: pain, arm function, return to work, quality of life, numbness, strength, or the need for another operation. These do not move together. Someone can have far less pain and still have some numbness, or regain function without full strength.¹³

Because studies also differ in who was included, which operation was done and how long people were followed, there is no honest single “success rate” for TOS surgery. When you hear a figure, it is fair to ask what was measured, in which patients and after how long.

Every approach carries risks, which differ between operations. They include injury to nerves or blood vessels, air leaking around the lung, bleeding, wound problems and persistent symptoms. Rehabilitation and follow-up are part of the treatment, and their timing depends on the operation and on you.²

Dr. Aghayev’s posterior approach

Dr. Kamran Aghayev has developed and published a posterior route to the first rib and the brachial plexus, through a short incision between the shoulder blade and the spine. The operation combines removal of the upper rib with decompression of the nerves and vessels; he calls it PURED (posterior upper rib excision and decompression).^{14, 15}

His 2023 report describes 80 procedures in 61 patients with neurogenic TOS operated on between 2015 and 2023. Patients reported marked improvement, and the complications recorded (an opening of the pleura, Horner syndrome and bleeding at the top of the lung) were not permanent. It is a single-surgeon retrospective series. It does not compare the operation with other approaches, and it does not show that the approach suits every type of TOS or prevents every recurrence.¹⁴ Read more on the PURED procedure page and in the standard surgery overview, which describes the other approaches.

Questions to ask before surgery

These questions are meant to help you have a clearer conversation with your surgeon, not to grade one:

Which type of TOS do I have, which findings show it, and could another condition be contributing?
Which structures will the operation address, and why is removing or keeping the rib right in my case?
Does the plan include muscle or band release or nerve decompression, and what findings justify those steps?
Which symptoms are expected to improve, which may persist, and how will recovery and rehabilitation be followed?
If I have already had surgery: what did the first operation include, and what evidence points to a target for further treatment?

If you have been offered TOS surgery, or symptoms have continued after a previous operation, a consultation can review the diagnosis, the treatment already tried and the proposed next steps. Bring existing reports and scans, and the operative report if you have had surgery, so the discussion can cover what was done and what still needs to be established. You can request an online consultation with Dr. Kamran Aghayev or book an appointment in Istanbul, and read about Dr. Aghayev’s background and publications.