Medical Oncologist
CION Cancer Clinics
Flail chest and paradoxical movement after surgery | CION Cancer Clinics
A flail segment is a patch of chest wall that is no longer fixed to the rest of the rib cage, so it sinks inwards when you breathe in and bulges when you breathe out. After cancer surgery it can happen when several ribs have been removed and the gap is not yet firm, or a repair has loosened. It is uncommon, the reconstruction is planned to prevent it, and it needs same-day assessment if it appears. This page explains how to spot it and what the team does. CION Cancer Clinics’ surgical oncologists in Hyderabad can talk this through with you.
MI
Medically reviewed by Dr. Mohammed ImaduddinConsultant Surgical Oncologist · MBBS, MS (General Surgery), MCh (Surgical Oncology) · last reviewed September 2026, next review due September 2027
17+specialists on panel
15,000+patients treated
35+centres across Telangana & AP
4.8★ / 800+Google rating
On this page
- What is a flail segment, and why does it matter after surgery?
- Why a flail segment can appear after chest wall surgery
- Normal chest movement and paradoxical movement, compared
- What the team does about a flail segment
- Words you will hear, in plain language
- Four things families ask us, and what is actually true
- What to watch for at home, and what this page cannot tell you
- Common questions about flail chest after surgery
The short answer
What is a flail segment, and why does it matter after surgery?
A flail segment is a patch of chest wall that is no longer fixed to the rest of the rib cage, so it moves the wrong way. It sinks inwards when you breathe in and bulges outwards when you breathe out. Doctors call this paradoxical movement, because it is the opposite of what the rest of the chest is doing.
Why the wrong movement is a problem
Breathing works by making the chest bigger so air is drawn in. If a patch of the wall collapses inwards every time you try, the lung under it does not fill properly. Each breath does less work, so you take more of them, and you tire. Over hours that shallow pattern lets the base of the lung close down, and infection can follow.
How it relates to chest wall surgery
Outside hospital, a flail chest usually follows a road accident that breaks several ribs in two places. After cancer surgery it can happen when several ribs in a row have been removed and the gap is not firm enough, or when a repair has loosened. Surgeons plan the reconstruction to prevent it, and most people never experience it.
A patch of chest sinking in when breathing in, after any chest operation, needs the same-day assessment described further down this page.The causes
Why a flail segment can appear after chest wall surgery
It is uncommon, and each cause has a known answer. The team plans around all of them before the operation.
A large gap at the front or side
Several ribs removed in a row at the front or side of the chest leave a patch with nothing firm in it. Under the shoulder blade the same gap is held steady by bone and thick muscle, which is why position matters more than the number of ribs.
A soft repair where a firm one was needed
Soft mesh alone can stretch and give with each breath if the gap is large. For big gaps at the front, surgeons use stiffened mesh or plates so the patch cannot move inwards.
A repair that has loosened
Stitches can pull through weakened bone, and plates can loosen, especially if there is infection or if the area had radiotherapy before. This tends to show weeks rather than days after surgery.
The breastbone removed
The breastbone holds the front of the chest together. Taking part or all of it without a rigid replacement lets the whole front of the chest move as one loose piece. This is why breastbone operations almost always use plates or stiffened mesh.
Not sure whether this applies to you?
Ask an oncologistSide by side
Normal chest movement and paradoxical movement, compared
Normal chest wall
Flail segment
Breathing in: the whole chest rises and widens
Breathing in: the patch sinks inwards while the rest rises
Breathing out: the whole chest falls together
Breathing out: the patch bulges outwards
Each breath fills both lungs evenly
The lung under the patch fills poorly, so breaths get faster and shallower
Coughing is effective
Coughing is painful and weak, so phlegm builds up
If it happens
What the team does about a flail segment
Confirm it and check the lung
The doctor watches the chest move, checks oxygen levels and arranges a chest X-ray or CT to see the repair and whether the lung beneath has partly collapsed or has fluid around it.
Control the pain properly
Good pain relief, sometimes through an epidural or a nerve block, lets you breathe deeply and cough. For a small flail segment this alone, with physiotherapy, is often enough while the area firms up.
Support the breathing if needed
Oxygen by mask, or a tight-fitting mask that pushes air in with each breath. If the lungs cannot keep up, a short spell on a ventilator in intensive care gives the chest time to stabilise.
Fix the wall if it will not settle
When the segment is large or the repair has failed, the surgeon goes back to make the wall rigid with plates or stiffened mesh. That decision is made with you and your family, with the reasons explained.
Leave a number, we will call you
One field. No form to fill in, and no charge for the call.
On your notes
Words you will hear, in plain language
- Flail segment
- A patch of chest wall that is no longer attached firmly to the rest of the rib cage and moves on its own.
- Paradoxical movement
- The patch moving inwards on breathing in and outwards on breathing out, the opposite of the rest of the chest.
- Rigid reconstruction
- A repair using plates or stiffened mesh that cannot flex, used to prevent or fix a flail segment.
- Atelectasis
- Part of the lung closing down because it is not being filled with each breath. It shows on the X-ray and improves with deep breathing.
- Non-invasive ventilation
- A tight mask that helps push air in with each breath, without a tube in the throat.
Commonly believed
Four things families ask us, and what is actually true
"A flail chest means the operation has failed."
It means the wall in one area is not yet firm enough. Sometimes that settles with pain control and time, and sometimes the repair is revised. The cancer operation itself, and the margin, are a separate question and are not undone by it.
"Strapping the chest tightly will hold it still."
Tight bandages stop the whole chest expanding and make breathing worse, not better. They also hide the movement the doctors need to see. Support the wound with a pillow when coughing, and leave the strapping to the hospital.
"He should breathe gently so the patch does not move."
Shallow breathing is exactly what lets the lung close down and infection take hold. Deep breaths with good pain relief are safer, even though the patch moves. The team will say if breathing needs supporting with a mask.
"Everyone who has ribs removed gets this."
Most people do not. The reconstruction is planned to prevent it, and gaps at the back are held steady by the shoulder blade anyway. It is far more common after road accidents than after planned surgery.
Being straight with you
What to watch for at home, and what this page cannot tell you
This page cannot tell you whether your own chest is moving normally. It can tell you what to look for. Sit the person upright in good light and watch the operated side as they breathe. Every part of the chest should rise together on breathing in. A patch that dips inwards while the rest rises is the sign.
What cannot wait
A patch of chest sinking in on breathing in, breathlessness that is getting worse hour by hour, lips or fingertips turning blue, or a fast, shallow breathing pattern that does not settle with rest. Go the same day to the hospital where the operation was done or the nearest emergency department, and say that ribs were removed and the chest is moving the wrong way. Do not wait for the next clinic date.
Who is more at risk
People who had several ribs removed at the front or side, or the breastbone. People whose area had radiotherapy before, because bone and skin heal less well. People with a wound infection, which can loosen the repair. If you are in one of these groups, the team will watch the chest more closely at follow-up. Ask what your repair was made of and what to watch for.
Take a short video of the chest breathing if you are unsure. It is easier to show than to describe.Questions we are asked
Common questions about flail chest after surgery
The operated side moves less than the other. Is that a flail segment?
Usually not. Moving less is expected after chest wall surgery, because the repair is stiffer than rib and the muscles are sore. A flail segment moves the wrong way: inwards on breathing in. If it only moves less, that is the normal pattern.
Can a flail segment appear weeks after going home?
Yes, if the repair loosens. That is more likely with infection, with bone weakened by earlier radiotherapy, or after a fall or heavy lifting. New wrong-way movement, new pain over the repair, or a wound that starts leaking at any point needs to be seen promptly.
Does it always need another operation?
No. A small segment often settles with proper pain control, physiotherapy and time, as scar tissue firms up around the repair. Surgery to make the wall rigid is for larger segments, or where breathing is not coping. Your surgeon will explain which applies and why.
Will she need a ventilator?
Only if the lungs cannot keep the oxygen up on their own, and then usually for a short time. Many people manage with oxygen and good pain relief, or with a tight mask that helps each breath. A ventilator is a way of resting the chest, not a sign that things are hopeless.
Why does the doctor keep asking about the pain?
Because pain is what makes breathing shallow, and shallow breathing is what turns a flail segment into a chest infection. Treating the pain well, sometimes with an epidural or a nerve block, is the first treatment, not an afterthought.
Is a flail chest after surgery the same as after a road accident?
The movement is the same, but the situation is different. After an accident the lung underneath is often bruised as well, which is what makes it dangerous. After planned surgery the lung is usually healthy, the team knows exactly what was removed, and the repair can be revised if needed.
Can I feel the plate or mesh moving?
A firm edge under the skin is normal. A click, a grinding feeling, or a patch that shifts when you press it is not, and may mean a plate has loosened. Do not press repeatedly to check. Tell the team and let them examine it.
How do I describe this on the phone to the helpline?
Say when the operation was, what was removed, and that a part of the chest is going in when breathing in. Say how fast the breathing is and whether the lips look blue. The nurse will tell you whether to come in now or go to the nearest emergency department.
Meet the Specialists
17+ senior cancer specialists. One panel for your case.
Trained at AIIMS, Tata Memorial, and leading international centres. Combined 150+ years of experience. Every complex case is reviewed by 3+ of them — together.
Medical Oncologist
Dr. C. Raghavendra Reddy
MBBS(Gold Medal), DNB(General Medicine), DM(Medical Oncology)(Gold Medal)
Medical Oncologist
Dr. Bharati Devi Gorantla
MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)
Medical Oncologist
Dr. Owais Mohammed
MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
Medical Oncologist
Medical Oncologist
Surgical Oncologist
Dr. Muralidhar Muddusetty
MBBS (AIIMS), MS (Surgery) (AIIMS), DNB (Surgical Oncology), MRCS (Edinburgh)
Surgical Oncologist
Surgical Oncologist
Surgical Oncologist
Dr. Vinay Mamidala
MBBS, MS(General Surgery), M.Ch(Surgical Oncology), FMAS, FARIS(Ongoing)
Surgical Oncologist
Radiation Oncologist
Radiation Oncologist
Radiation Oncologist
Hematologist
Surgical Oncologist
Dr. Vajja Sandeep Kumar
MBBS, MS (General Surgery), DrNB (Surgical Oncology), FALS Oncology
Surgical Oncologist
Want a specific doctor for your case? Mention them when booking.
Book Free ConsultationBook an appointment with our specialist
Share your name and number — we'll call you back within 30 minutes to schedule your consultation.
Sources
- Cancer Research UK — Surgery for cancer
- NHS — Broken or bruised ribs
- Macmillan Cancer Support — Surgery
- National Cancer Institute — Surgery to Treat Cancer
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
Keep reading
Related pages
Breathing and Chest Movement After ReconstructionWhat normal recovery of breathing looks likeChest Wall Reconstruction: Mesh and FlapsThe firm repair that prevents a flail segmentRib Resection and How Many Can Be RemovedWhy position matters more than the number of ribsComplications and Red FlagsEverything after surgery that needs same-day careCaretaker and Family Guide to SurgeryWhat the family watches for at home
Talk to us
Is part of the chest moving the wrong way?
Call the helpline now and describe what you see, or send a short video. A nurse will tell you whether to come in or go to the nearest emergency department. One helpline serves every CION centre.