Pectus Excavatum and Cosmetic Surgery: Why a Sunken Chest Changes Breast and Chest Plans, When the Bone Should Be Fixed Instead of Hidden, and What Custom Implants and Fat Can and Cannot Do

There is a particular kind of consultation that plastic surgeons who see enough chests will recognize. A man in his twenties or thirties asks about pectoral implants because, despite years in the gym, the center of his chest looks hollow and the muscle on either side never seems to meet. Or a woman asks about breast augmentation because her breasts sit wide apart, one a little lower than the other, and no bra ever seems to bring them together. In both cases the surgeon runs a hand down the middle of the chest, feels the breastbone sitting lower than the ribs around it, and says a phrase the patient has often never heard: pectus excavatum.

Pectus excavatum is a depression of the sternum and the cartilage that connects it to the ribs, producing the sunken or funnel-shaped chest the name describes. It is the most common congenital chest wall deformity, with incidence figures in the pediatric surgical literature usually given as somewhere between one in three hundred and one in a thousand births, and it is diagnosed in boys several times more often than in girls. Many cases are mild. Many are never formally diagnosed, because the depression was noticed in childhood, called cosmetic, and left alone. Those are the patients who arrive in a plastic surgery office as adults, asking for something on top of the chest when the question they actually have is about what is underneath it.

That is the core issue this piece is about. A sunken chest can be camouflaged, sometimes beautifully, with soft tissue methods: a custom implant, fat grafting, or breast implants planned around the defect. It can also be repaired at the level of the bone and cartilage, by a thoracic or pediatric surgeon, with operations that are bigger and more painful but address the actual structure. Which path makes sense depends on how deep the depression is, whether it affects the heart and lungs, how old the patient is, and what they want to look like. Getting that order wrong is the most consequential mistake in this corner of chest surgery.

What pectus excavatum is, and why it so often surfaces at a cosmetic consultation

The short answer: pectus excavatum is an inward displacement of the lower sternum caused by abnormal growth of the rib cartilages, it usually becomes obvious or worsens during the adolescent growth spurt, and because mild and moderate cases often go untreated, many adults first encounter the diagnosis when they ask a plastic surgeon about the appearance of their chest or breasts.

The mechanism is still debated, but the leading explanation is overgrowth or abnormal growth of the costal cartilages, the flexible segments that connect the ribs to the sternum. As those cartilages lengthen unevenly, they push the lower sternum backward toward the spine. The depression may be present at birth or appear in early childhood, but it commonly deepens sharply during the growth spurt of the early teens, which is why so many patients remember the chest looking normal until about age twelve and noticeably sunken by sixteen.

The shape varies. Some patients have a narrow, deep, cup-like depression centered on the lower sternum. Others have a broad, shallow saucer that spans much of the front of the chest. Many have an asymmetric form in which one side, more often the right, is deeper and the sternum itself is rotated. That rotation is the detail that matters most to a cosmetic surgeon, because it means the two sides of the chest wall are not mirror images, and anything placed on top of them will inherit the difference. The broader principle is laid out in the piece on facial and breast asymmetry: a meaningful share of what patients read as breast asymmetry is the rib cage underneath.

Pectus excavatum also travels with other conditions often enough that a surgeon should ask about them. It is associated with connective tissue disorders, including Marfan syndrome and Ehlers-Danlos syndrome, with scoliosis, and with mitral valve prolapse. Most patients with a sunken chest have none of these. But a tall, slender patient with long fingers, joint laxity, a history of lens problems, or a family history of aortic disease deserves a closer look before any elective operation, for reasons that have nothing to do with the chest wall's appearance. The surgical implications of fragile connective tissue are covered in the piece on Ehlers-Danlos syndrome and cosmetic surgery, and they apply here as well.

Why does the diagnosis so often surface late, and in a cosmetic setting? Partly because mild pectus causes no symptoms, so there is no reason for a family doctor to pursue it. Partly because, for decades, the advice given to families was that the deformity was cosmetic and would not affect health, which is true for many patients and not for all. And partly because the people most bothered by a sunken chest are often bothered by how it looks. Men describe a chest that looks caved in under a fitted shirt and a hollow that no amount of bench pressing fills. Women describe breasts that seem to point away from each other, a wide gap at the cleavage, and a bra that never sits flat at the center. Those complaints bring them to a plastic surgeon, which is often the first time anyone has measured the defect.

Measuring the depression, and the workup that should come before any cosmetic plan

The short answer: the depth and shape of a sunken chest are measured with a CT or MRI scan, most commonly expressed as the Haller index, and any patient with a moderate or severe defect or symptoms such as shortness of breath on exertion, chest pain, or palpitations should have a cardiopulmonary evaluation before choosing a purely cosmetic camouflage.

The standard measurement is the Haller index, described by J. Alex Haller and colleagues in the Journal of Pediatric Surgery in 1987. On a single cross-sectional image at the deepest point of the depression, the widest inside diameter of the chest is divided by the shortest distance between the back of the sternum and the front of the spine. A typical chest gives a value of roughly two and a half. A value above about 3.25 has long been used as the threshold for a severe defect, and it is the number many insurers and surgical programs still reference when deciding whether a structural repair qualifies as medically necessary. Newer measures, such as the correction index, try to capture how much of the chest's depth is missing rather than only its ratio, and some centers use them alongside or instead of the Haller index.

The index matters to a cosmetic patient for a reason that is easy to overlook. A camouflage operation changes the surface. It does nothing to the distance between the sternum and the heart. If that distance is small enough to displace or compress the heart, as it is in some severe cases, an implant on top of the chest leaves the compression exactly where it was. Studies in the thoracic and pediatric surgical literature have reported that moderate to severe pectus can reduce exercise capacity and that structural repair improves measured cardiopulmonary function in at least some patients, though the size and consistency of the effect remain debated. The point is not that every sunken chest is a heart problem. It is that the question should be asked, and answered with testing where the defect or the symptoms warrant it, before the defect is covered over.

A reasonable workup, for anyone with more than a mild depression, usually includes:

• Cross-sectional imaging. A CT scan or, increasingly, an MRI to avoid radiation, to measure the defect and see its shape, depth, symmetry, and sternal rotation. A custom implant designer will want the same scan, so it serves both purposes.
• A cardiac assessment. An echocardiogram to look at heart compression and to check for mitral valve prolapse, and in patients with features of a connective tissue disorder, the aortic root.
• Pulmonary and exercise testing where symptoms suggest it. Pulmonary function tests and, in some centers, cardiopulmonary exercise testing, which measures how the heart and lungs perform under load rather than at rest.
• A history of the chest. When the depression appeared, whether it worsened in adolescence, and whether it is still changing. A defect that is still progressing in a teenager is a different problem from one that has been stable for fifteen years.

A plastic surgeon who offers a pectoral or custom chest implant to a man with a deep defect without ordering a scan, or a breast augmentation to a woman with a visibly rotated sternum without mentioning the diagnosis, is skipping a step. The same principle runs through the piece on pre-op testing before cosmetic surgery: tests should be chosen by what the patient's history and anatomy raise, and a sunken chest raises specific ones.

Fixing the bone instead of hiding it: the Nuss procedure, the Ravitch repair, and the vacuum bell

The short answer: the structural options are the minimally invasive Nuss procedure, which pushes the sternum forward with a curved steel bar left in place for about two to three years, the open Ravitch repair, which removes or reshapes the abnormal cartilage, and the vacuum bell, a suction device that can gradually lift a flexible chest in younger patients, and all three work better in adolescents than in adults, though adult repair is increasingly common.

The Nuss procedure, described by Donald Nuss and colleagues in the Journal of Pediatric Surgery in 1998, changed the field. Through small incisions on the sides of the chest, the surgeon passes a curved stainless steel bar behind the sternum, under direct camera visualization, and flips it so the curve pushes the sternum outward. The bar stays in place, typically for two to three years, while the chest wall remodels around its new shape, and is then removed in a second, shorter operation. Some patients need two or three bars. The scars are small, but the operation is not minor: early postoperative pain is significant, and pain control has become a subspecialty of its own, with intercostal nerve cryoablation, freezing the nerves that supply the chest wall so they stop transmitting pain for a period of weeks to months, now widely used to shorten hospital stays.

The Ravitch repair, in its modern modified form, is the older open approach. Through an incision across the front of the chest, the surgeon removes or reshapes the overgrown cartilages, repositions the sternum, and often supports it with a temporary bar or strut. It leaves a longer scar on the front of the chest, which matters to a patient who came in for cosmetic reasons, but it gives the surgeon direct control over a stiff or highly asymmetric chest, and some centers prefer it or a hybrid technique for older patients or complex defects.

The vacuum bell is the nonsurgical option. It is a cup placed over the depression, from which air is pumped out by hand to create suction that pulls the sternum forward. Patients wear it for a set number of hours a day, over months to years. The results reported in the literature are strongest in younger patients with flexible chest walls, shallower defects, and the discipline to wear the device consistently. In adults, whose cartilage has stiffened, improvement is generally more modest, though some adults do use the device, sometimes as a test of how much the chest will move before a surgeon plans a repair.

Adult repair deserves its own note, because adults are the patients most likely to walk into a plastic surgery office first. The Nuss procedure is performed in adults, and series from high-volume centers report good results, but the adult chest is stiffer, more bars are often needed, postoperative pain is greater, and the reported rates of bar displacement and reoperation tend to be higher than in teenagers. None of that is a reason to rule out structural repair in an adult. It is a reason the decision should be made with a thoracic surgeon who does these operations regularly, not by default in the absence of that conversation.

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An implant can fill the hollow a sunken chest leaves on the surface. It cannot move the sternum a single millimeter away from the heart, and a patient deserves to know which of those two problems they actually have before choosing an operation that only solves one.

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Camouflage: custom chest implants for men, fat grafting, and breast augmentation for women

The short answer: for patients whose defect is mainly an aesthetic problem, a custom solid silicone implant designed from a CT scan can fill the depression with a single operation, fat grafting can soften milder or smaller defects over several sessions, and in women a breast augmentation can disguise much of the deformity, but each method only changes the surface and each carries complications specific to a chest that is shaped differently from the one standard implants were designed for.

Custom implants are the modern camouflage of choice for a moderate defect in a patient who does not want or need structural repair. The implant is designed from the patient's own CT scan: the depression is reconstructed in three dimensions on a computer, an implant is shaped to fill it exactly, and the device is manufactured from solid medical-grade silicone elastomer, the firm, rubbery material rather than the cohesive gel used in breast implants. Because it is solid, it cannot rupture or leak in the way a gel implant can. It is usually placed through a short incision at the lower end of the sternum, in a pocket beneath the pectoralis major muscles or beneath the fascia, so that soft tissue covers its edges.

This is a different device from the off-the-shelf pectoral implants discussed in the piece on calf and pectoral implants, which are designed to add bulk to the muscle on each side of a normal chest. Placing standard pectoral implants on either side of a sunken sternum can make the hollow between them look deeper, the opposite of what the patient wanted. A custom device fills the defect itself. The most commonly reported complication with custom chest implants is seroma, a collection of fluid in the pocket around the implant, which may need to be drained and which is discussed in general terms in the piece on seroma after plastic surgery. Infection, visible or palpable edges in thin patients, and displacement are the other recognized risks, and like many specialty implants, the long-term published data are thinner than they are for breast implants, a gap explored in the piece on the FDA MAUDE database and implant complaints.

Fat grafting is the other soft tissue option. Fat is harvested by liposuction, processed, and injected into the tissue over the depression. It has the advantage of using the patient's own tissue and the side benefit of contouring the donor site. Its limits are volume and predictability. A deep defect needs more fat than a single session can reliably keep alive, because a graft needs a blood supply from surrounding tissue to survive, and the thin tissue over a sunken sternum is a poor bed. The biology is set out in the piece on fat graft survival. In practice, fat is most useful for mild defects, for smoothing the edges of a custom implant, and for patients who want to avoid a device entirely and accept that two or three sessions may be needed.

For women, the conversation is usually about breast augmentation, and here pectus excavatum changes the plan in specific ways. The breasts sit on a chest wall that slopes inward toward a sunken center, so each breast is effectively mounted on a tilted base and the nipples often point outward. The gap between the breasts is wider than the breast tissue itself would explain. If the sternum is rotated, one breast commonly sits lower or projects differently from the other. An implant placed on that platform inherits its tilt, and the asymmetry often becomes more visible once volume is added, the same problem described in the asymmetry piece above.

A surgeon who recognizes the defect will plan around it rather than around the breasts alone. That can mean different implant sizes or profiles on each side, discussed in the piece on round versus teardrop implants and profile, careful pocket dissection so the implants do not slide toward or away from the depression, and in some cases a custom sternal implant combined with breast augmentation, either in the same operation or staged. Placement plane matters because coverage over the inner edges of the implants is often thin on a pectus chest, which is one of the tradeoffs explained in the piece on the shift toward prepectoral placement. And the limits on how far implants can bring the breasts together are real: pushing the pockets toward the midline over a sunken sternum risks the kind of problems described in the piece on breast implant malposition and symmastia. Size selection, as with any augmentation, should come from measurement, along the lines set out in the piece on how surgeons decide implant size.

Sequencing, insurance, and the decisions that are hard to undo

The short answer: if structural repair is a realistic possibility, it should usually come before camouflage, because lifting the sternum changes the platform on which breast or chest implants sit; insurance coverage generally depends on documenting a severe defect and physiologic impairment for structural repair, while camouflage operations are almost always treated as cosmetic.

Sequencing is where the decisions become hard to undo. A woman who has a breast augmentation over a sunken chest and then, five years later, has a Nuss procedure will find that the sternum and the inner ribs have moved forward under her implants. The breasts may move closer together, which many patients welcome, but the implants are now sitting on a different platform than the one they were sized and positioned for, and a revision may follow. A man with a custom sternal implant who later decides to have structural repair faces a different problem: the implant sits directly in front of the area the bar or the open repair needs to reach, and it will often need to be removed. Neither scenario is a disaster. Both are reasons to decide, before the first operation, whether structural repair is something the patient might ever want.

The reverse order has its own considerations. A patient who has had a Nuss repair and still wants breast augmentation or chest contouring afterward is generally advised to wait until the bar has been removed and the chest has settled, so the result is planned on the final shape of the chest wall. Breast imaging is also worth thinking through, because implants and fat grafts both change how mammograms and MRIs are performed and read, as explained in the piece on breast imaging after implants and fat transfer.

Age is another sequencing factor. In a teenager whose chest is still changing, structural repair or a vacuum bell may be appropriate, but a cosmetic implant is generally premature, both because the chest is not finished growing and because of the broader cautions laid out in the piece on cosmetic surgery for teenagers. Most surgeons who place custom chest implants wait until growth is complete.

Insurance follows the same divide. Structural repair can be covered when the defect is documented as severe, typically with imaging and a Haller index above the threshold the insurer uses, and when there is evidence of physiologic impairment such as abnormal cardiac or pulmonary testing. Policies vary, and the documentation requirements are specific, which is why the process described in the piece on insurance coverage and medical necessity applies here more than to most chest operations. Custom implants, fat grafting, and breast augmentation to disguise a sunken chest are almost always classified as cosmetic, even when the underlying condition is congenital.

Finally, the psychological piece. Many people with pectus excavatum describe years of avoiding swimming pools, changing rooms, and fitted shirts, and studies of patients undergoing repair have reported improvements in body image and quality of life afterward. That is a legitimate reason to seek treatment. It also means the decision is an emotional one, and a patient who has hidden their chest since adolescence may be inclined to accept the first operation offered. The broader screening considerations, and the difference between a real deformity and a perception that no operation will fix, are covered in the piece on body dysmorphic disorder screening. A patient with a measurable defect and a clear goal is not a screening concern. A patient whose chest has been called normal by several surgeons and who still sees a deformity may be.

The honest summary

Pectus excavatum is common, often mild, and frequently undiagnosed until an adult walks into a plastic surgeon's office wanting their chest or breasts to look different. For many of those patients, camouflage is a reasonable answer. A custom solid silicone implant designed from a CT scan can fill a moderate defect in a single operation. Fat grafting can soften a mild one. A breast augmentation planned around the chest wall, rather than around the breasts alone, can disguise much of the deformity in women. Each of those operations changes the surface and nothing beneath it.

The step that should come first is measurement. A scan to define the depth, shape, and symmetry of the defect, and for anyone with a moderate or severe depression or symptoms on exertion, a heart and lung evaluation, settles whether the problem is cosmetic or structural. If structural repair is realistic, through a Nuss procedure, a modified Ravitch repair, or a vacuum bell in younger patients, it usually belongs before camouflage, because lifting the sternum changes the platform every implant sits on. The surgeon worth trusting with a sunken chest is the one who names the condition, measures it, explains both paths, and is comfortable sending the patient to a chest wall surgeon before offering an implant.