In short. Breast asymmetry can sit in the chest wall, where a curve of the spine or a difference in the rib cage holds the two sides at different heights. An operation can change breast volume, shape and position, but it cannot move the chest wall, so part of the difference remains however well the breasts are matched.
Key points
- A chest wall difference comes from the spine, the rib cage or the development of the chest.
- It holds the two breasts at different heights and on different planes.
- The difference often becomes more obvious standing and less obvious lying down.
- An operation can change the breast but cannot move the chest wall.
- A named residual difference, stated before surgery, prevents the commonest disappointment.
What a chest wall difference looks like
Not every difference between the breasts sits in the breasts. A curve of the spine, a difference in the rib cage, or an asymmetry of the chest wall itself holds the two sides at different heights and on different planes. That distinction changes what an operation can achieve, and it is worth establishing before a plan is made rather than after it has been carried out.
The two breasts sit at different levels on the chest, or one side of the chest is flatter or more prominent than the other, or the whole of one side sits further forward. In some patients the finding is a rib that sits differently, in others a curve of the spine, and in others a difference in how the chest itself developed.
Why does the difference change with posture?
The difference may change noticeably with posture, becoming more obvious when the patient stands and less when she lies down, because the chest wall moves with the spine and the breast tissue does not. A difference that behaves in that way is one piece of evidence that the chest beneath is contributing.
Which part of the difference belongs to the breast?
The most useful self-observation is where each breast starts at the top, against the chest wall. If one begins higher than the other, the difference is at least partly one of position on the chest rather than of the breast itself. A mirror and a horizontal reference, such as the line of a tiled wall, will usually show it. Describing that at an assessment is more informative than describing size.
What an operation can and cannot change
An operation changes the breast. It can add volume, remove volume, lift tissue and move the fold. It does not move the chest wall, and it cannot raise one side of the rib cage to meet the other. Where the chest wall contributes to the difference, part of the difference will remain however well the breasts themselves are matched. That is not a complication and it is not a technical shortfall. It is the boundary of what operating on the breast can address.
| Feature | Difference in the breast | Difference in the chest wall | What follows |
|---|---|---|---|
| What varies | Volume, shape, tissue and fold | Level of the ribs, the spine or the chest | What an operation can address |
| Effect of posture | Breast tissue does not move with the spine | More obvious standing and less obvious lying down | A finding that moves with the posture |
| Effect of the operation | Can be changed | Cannot be raised to meet the other side | Part of the difference will remain |
| Self-observation | Size compared between the two sides | Where each breast starts at the top | Position as well as size |
| What the plan can promise | Matching what the tissue allows | A named residual difference | A target rather than a level result |
| What a promise of level breasts means | Within the reach of the operation | Beyond what the operation can keep | A promise that cannot be kept |
Why the finding should be stated before the operation
Because a patient who is told before the operation that a residual difference will remain judges the result against the plan. A patient who is not told discovers the residual difference at three months and reads it as the operation having failed, which is worse than the finding itself. Establishing the chest wall contribution at the first assessment is the cheapest thing in this whole subject and it prevents the most common disappointment.
What remains after the breasts are matched?
Part of the difference will remain, and the plan should say which part. Compensating with volume may make the two sides read as more balanced without being level. A promise that the two will be level afterwards is a promise the operation cannot keep.
The honest position is that a chest wall contribution changes the target rather than removing the option. A patient who understands which part of the difference is the breast and which part is the chest beneath it will read her result far more fairly than one who was told only that the two would be matched.
Sources
- American Society of Plastic Surgeons: breast surgery and patient safety guidance
- NICE (UK): guidance on breast surgery and on venous thromboembolism prevention
- Cochrane Library: systematic reviews in breast surgery and wound care
Source links open each organisation's search results for the topic. Document-level confirmation is pending the reviewer's sign-off.
Internal links
Frequently asked questions
How do I know if my chest wall is involved?
The examination establishes it from the shape of the rib cage, the level at which the two breasts sit on the chest, and how the two sides behave when the patient stands and lies down. A difference that changes markedly with posture, or that involves the whole of one side of the chest, points towards the chest wall rather than the breast. It is a clinical finding rather than an imaging one in most cases.
Can anything be done about it?
Part of it can be compensated for and none of it can be corrected from the breast. Volume and position can be adjusted so that the difference reads as smaller, and the underlying asymmetry of the chest remains. Where the difference is marked, the honest plan is built around what can be changed, and the patient is told what will remain rather than discovering it later.
Does it mean I cannot have surgery at all?
No. It means the plan is written with the chest wall in it rather than being written as though the two sides were the same. Many patients with a chest wall contribution have a plan that improves the balance appreciably. What the finding changes is the target, not the availability of an operation.
Risks & Limitations
- No operation produces a matched pair. The two sides start differently and heal on different schedules, so a small residual difference in size, shape or position is the expected outcome rather than a complication.
- The recovery is that of the larger of the two operations in the plan, not an average. A lift carries scars that an augmentation does not, and a longer period for those scars to mature.
- Where the difference is partly in the chest wall, that part cannot be corrected from the breast and will remain after the operation.
- Scars are permanent, and a plan that treats the two sides differently leaves scars of two different kinds.
- A difference that is new, changing, or accompanied by a lump, skin change or nipple discharge is assessed as a diagnostic question before any surgical planning.
- Changes in nipple or skin sensation may occur, are often temporary, and may be lasting. Where an implant is used, its own long-term considerations apply.
When to Seek Care
- A new lump, a change in the skin over either breast, discharge from the nipple, or a change in the nipple itself &mdash — have it assessed promptly rather than waiting for a cosmetic appointment.
- Fever, spreading redness, warmth or discharge from a wound, or a wound that is opening.
- A breast that becomes hard, swollen, painful or red around an implant &mdash — contact the team the same day.
- Calf pain, swelling or tenderness in one leg, or shortness of breath or chest pain &mdash — seek emergency care at once.
- Chest pain, breathlessness or a racing heartbeat after surgery &mdash — seek emergency care at once.
References & Further Reading
- American Society of Plastic Surgeons (ASPS) - breast surgery and patient safety guidance
- National Institute for Health and Care Excellence (NICE, UK) - guidance on breast surgery and on venous thromboembolism prevention
- Cochrane Library - systematic reviews in breast surgery and wound care
- British Association of Plastic, Reconstructive and Aesthetic Surgeons (BAPRAS) - patient information on breast surgery
- Chinese Medical Association Plastic Surgery Branch - clinical guidance
This page is patient education, not medical advice, and it does not cite individual studies. Discuss your own case with a qualified clinician. To arrange an assessment at Chongqing West District Hospital, see Contact & Consultation.