Dog-Ears After a Tummy Tuck and Liposuction: The Cone the Geometry Predicts, the Scar Length Nobody Wants to Trade for It, and the Six Months Before Anyone Should Cut

Every long scar has two ends, and the ends are where body-contouring surgery most often goes visibly wrong. The term the profession uses for what happens there is a dog-ear: a raised cone of skin and fat that stands up at the tail of an incision where the tissue on either side has been pulled together and has nowhere to go. The textbooks call it a standing cutaneous cone or a standing cone deformity. Patients call it the lump at the end of my scar, and after a tummy tuck it is, in most surgeons' hands, the single most common reason a patient returns for a second, smaller operation.

This piece exists because the dog-ear sits in an odd place in the consultation. It is common enough that a surgeon who has done a few hundred abdominoplasties has revised dozens of them. It is predictable enough that the surgeon can see it coming at the drawing stage, while the patient is still standing in the marking room. And it is almost never discussed before surgery in the terms that matter: that the surgeon is trading scar length against cone size on the patient's behalf, and that the patient, who is the one who will live with both, is rarely told there is a trade to be made.

The piece on the mini tummy tuck versus the full abdominoplasty and the piece on the fleur-de-lis pattern both cover how a surgeon chooses the operation. This one covers what happens at the ends of the scar the operation leaves, on the abdomen and on the arm, the thigh, and the breast, and why the answer is not the same for a patient who is thin as for one who has lost a great deal of weight.

A dog-ear is geometry, not carelessness

The short answer: when an ellipse of skin is removed and the two long edges are sewn together, the tissue at each end has to be gathered into a smaller and smaller length as the edges converge, and if the ellipse is too short for its width, or its ends are too blunt, that gathering produces a cone that stands up off the surface; the classic teaching is that a fusiform excision needs a length at least three times its width, with the ends tapered to roughly thirty degrees, to close flat.

The rule is old and it comes from the smallest version of the problem. A dermatologic surgeon removing a mole draws an ellipse around it. If the ellipse is drawn long and pointed, the two sides come together in a flat line. If it is drawn short and round, the sides meet in the middle and the skin at each end bunches into a small tent. The tent is the dog-ear, and every resident learns to fix it by extending the incision at that end, cutting a small triangle of skin (a Burow's triangle, after the German surgeon who described it), and laying the edge down flat. The cost of the fix is a longer scar. That cost is trivial on the cheek of a mole excision. It is the whole argument on an abdomen.

The abdominoplasty takes the same geometry and enlarges it fifty-fold. The surgeon removes an ellipse of skin and fat that can run from one hip to the other and from the pubic hairline to above the navel. The upper edge of the wound is long, because it runs across the widest part of the abdomen. The lower edge is shorter, because it sits low, above the pubis, where the body is narrower. When a longer edge is sewn to a shorter one, the excess on the long side has to be distributed somewhere, and the surgeon does it by gathering the upper flap along the closure, a technique called tailor-tacking, in which the flap is pinned at intervals and the surplus is spread evenly rather than dumped at the ends. When it cannot all be spread, the surplus arrives at the two lateral ends of the scar, over the hips, and stands up.

Three things make the abdominal version worse than the mole version.

• The ends sit over the thickest tissue on the torso. The lateral end of a tummy tuck scar lands over the hip and flank, where the subcutaneous fat is deepest and the skin least mobile. A cone of skin alone flattens with time. A cone with a plug of fat inside it does not, because there is nothing to contract.
• The skin at the ends was not treated. A tummy tuck removes skin from the front of the abdomen. It does nothing to the flank and the back. When the front is pulled tight and flat, the untreated flank beside it looks fuller by comparison, and the transition between the two, which is exactly where the scar ends, becomes the place where the eye lands.
• The patient asked for a short scar. This is the quiet driver. Patients arrive with a photograph of a scar that ends inside the hip bones, and a surgeon who obliges by stopping the incision short, on a patient whose excess extends past that point, leaves the excess where the scar stopped. The scar is shorter. The cone is bigger. Both were chosen in the same moment.

The physics of it is unforgiving enough that the dog-ear can be predicted before the first cut. The surgeon marks the patient standing, pinches the excess at the flank, and sees where it runs out. Where it runs out is where the scar has to end. If the scar is drawn to end earlier than that, the surgeon already knows a cone will form and is choosing, on the patient's behalf, to accept it.

Where the cone forms after each operation

The short answer: after a full abdominoplasty the dog-ear forms at the lateral ends of the low transverse scar, over the hips; after an arm lift it forms at the armpit end and sometimes at the elbow; after a medial thigh lift, in the groin crease; after a Wise-pattern breast reduction or lift, at the outer end of the fold scar toward the side of the chest; and after liposuction alone, what patients call a dog-ear is usually a shelf of untreated fat at the border of the treated zone, which is a different problem with a different fix.

The abdomen is the common case and it has been described. The piece on the mini tummy tuck makes the point that the short scar of a mini is only appropriate on a patient whose excess is confined to the lower abdomen, and the reason is precisely the dog-ear: a short scar on a patient with excess running around to the flank produces a cone at each end that is more visible than a longer scar would have been. The same logic scales. A patient who has lost a great deal of weight has skin excess that runs around the entire trunk, and a transverse scar that stops at the hip leaves a roll behind it, sometimes large enough to be a second procedure in itself. That patient needs an extended abdominoplasty, in which the scar continues around the flank toward the back, or a circumferential lower body lift, in which it goes all the way round. The ends of the scar, in the circumferential case, meet each other and there is no end to form a cone at.

The arm is the second commonest site and the least forgiving. The brachioplasty scar runs from the armpit down the inner arm, sometimes to the elbow, and the piece on the arm lift versus arm liposuction covers the trade between that scar and the result. What it does not dwell on is that the axillary end of the scar, where the arm meets the chest, is where the excess of the arm meets the excess of the side of the chest, and a surgeon who stops at the armpit on a patient whose loose skin continues onto the chest wall leaves a fold there that is visible with the arm raised. The elbow end has the same problem in miniature. The fix at either end is a longer scar, into the axilla and onto the chest in the first case, and below the elbow in the second, and patients who chose the arm lift specifically to avoid a long scar do not receive that news well.

The thigh has the groin. The medial thigh lift, which the thighplasty piece covers, places its scar in the groin crease, and the excess at the front and back ends of that crease bunches in a place that is tender, moist, and prone to healing poorly. Dog-ears here are less often revised than tolerated, because the revision means operating again in the groin.

The breast produces the dog-ear that patients are least prepared for. In a Wise-pattern reduction or lift, the anchor-shaped scar has a horizontal limb running along the inframammary fold, and that limb has an outer end that heads toward the side of the chest. On a large-breasted patient, whose breast tissue extends round toward the back, the excess at the outer end of that fold scar bunches into a lateral cone, sometimes with a roll of tissue behind it that the reduction did not touch. The piece on gender-affirming top surgery makes the same point about the double-incision chest, where the scars end at the lateral chest and dog-ears there are the leading reason for a revision. The mechanism is identical: a long scar across a curved surface, ending where the tissue is thick.

Liposuction is the case that needs untangling, because the word is used loosely. Liposuction does not make a scar long enough to have a dog-ear at its end. What it can produce is a step, a shelf, or a residual bulge at the margin of the treated area, where the surgeon stopped suctioning and the untreated fat beside it now stands proud. Patients call this a dog-ear because it looks like one. It is actually a contour transition, a feathering problem, and it is fixed not by cutting skin but by suctioning the border zone to blend it. The piece on high-definition liposuction and the saddlebag piece both touch the same principle: the edge of the treated zone is where the result is judged.

The surgeon's tools, and the trade behind each of them

The short answer: a surgeon prevents dog-ears by drawing the scar long enough to reach the end of the excess, by tapering the ends of the ellipse rather than rounding them, by tailor-tacking the closure so surplus is spread along its length rather than piled at the ends, by suctioning the fat under the lateral ends so the cone has no plug inside it, and, in the weight-loss patient, by choosing a longer or circumferential operation from the start; every one of these buys a flatter end with a longer scar, more time on the table, or both.

The first tool is the pencil. In the marking room, before anesthesia, the surgeon pinches the flank with the patient standing and follows the excess as far as it runs. Where the pinch flattens out, the scar can stop. On a thin patient with a small lower-abdominal apron that is well inside the hip bones. On a patient after pregnancy with flank fullness it is usually at or past the hip bone. On a patient after bariatric surgery it may be at the back. Surgeons describe the honest version of this conversation as showing the patient the mark and saying: this is where your scar ends if I want no cone; this is where it ends if you want it shorter, and here is what will be left. Very few patients are shown both marks. Most are shown the one the surgeon has already chosen.

The second tool is the taper. The ends of the ellipse are drawn to a point rather than a curve, so that the closure converges gradually. It is the same thirty-degree rule the dermatologist uses, applied on a larger scale, and it lengthens the scar slightly at each end in exchange for a flat finish.

The third is the closure itself. Tailor-tacking, pinning the upper flap to the lower edge at intervals with staples or temporary sutures and then adjusting until the surplus is distributed, is the step that separates a scar that lies flat along its whole length from one that gathers at the ends. The progressive tension suture technique that the piece on the drainless tummy tuck describes does something similar under the surface: by anchoring the flap to the abdominal wall at intervals, it takes the pull off the skin closure and spreads it, and surgeons who use it report fewer lateral cones as one of the secondary benefits.

The fourth is the cannula. Suctioning the fat under the lateral ends of the closure, and the flank beside it, removes the plug that would otherwise sit inside the cone and stop it from flattening. This is the core insight of the lipoabdominoplasty, the combination of liposuction and skin excision that the Brazilian surgeon Osvaldo Saldanha popularized in the early 2000s and that has since become close to standard in many practices: the skin resection handles the front, the liposuction handles the flanks and the transition, and the ends of the scar no longer mark a border between treated and untreated tissue. The American Society of Plastic Surgeons' most recent procedural statistics show liposuction and abdominoplasty among the most frequently performed body procedures, and a large share of the abdominoplasties in that count now include flank liposuction as part of the same operation.

The fifth is the choice of operation. A surgeon who sees excess running to the back and proposes a standard abdominoplasty anyway is proposing a dog-ear. The extended abdominoplasty carries the scar round the flank; the belt lipectomy or lower body lift carries it round the back; both add scar and time and both remove the end at which a cone would otherwise form. The fleur-de-lis piece covers the vertical version of the same reasoning, for the patient whose excess runs up and down rather than round.

There is a sixth option, which is honesty. Some surgeons, on a patient who wants a short scar and has excess past its end, explain that a small cone will form and that they will revise it under local anesthesia at six months, and the patient agrees to the two-step plan. This is a legitimate approach. It is only a problem when the second step is not disclosed until the first is done.

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A dog-ear is not a surprise and it is rarely a mistake. The surgeon can see it at the marking stage, standing beside the patient with a pencil, and the decision that produces it is a trade: a shorter scar buys a bigger cone. The problem is that the patient is usually the last person told there was a trade.

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Why everyone is told to wait six months

The short answer: much of what looks like a dog-ear in the first weeks is swelling and stiff scar tissue at the end of a closure, and it settles as edema drains and the scar softens over three to six months, so a competent surgeon will not revise before six months and many prefer a year; the cone that is still standing at six months, with a pinch of fat inside it, is a true tissue excess that will not flatten on its own.

The waiting rule frustrates patients more than any other part of the process, and it deserves to be explained rather than asserted. The piece on the swelling timeline lays out the sequence: bulk swelling in the first two weeks, a slower resolution over the next two to three months, and residual firmness at the surgical site that can persist to six months and beyond. The ends of a long incision are where fluid pools, because they are the lowest and most dependent points on a patient who is standing, and because the lymphatic channels that drain the lower abdomen have been divided and are regrowing. A lateral fullness at three weeks is, more often than not, a pocket of edema over a firm scar. It goes down.

Scar behaviour adds to this. A fresh scar is thick, raised, and contracted, and it is thickest where the closure was under the most tension, which is the ends. Over months it softens, flattens, and relaxes, and a ridge that felt like a cone at eight weeks can feel like a flat line at six months. The scar-care piece covers what helps that process and what merely sells; the relevant point here is that no revision should be planned on a scar that is still remodelling.

The third reason to wait is that the surrounding tissue is still moving. The abdominal skin after a tummy tuck contracts and redistributes for most of a year. A flank that looked full against a freshly flattened abdomen at two months often looks proportionate at nine, as the whole silhouette settles. The same is true at the arm, where a fold at the armpit at six weeks may be a fold of swelling, and at the breast, where the lateral fullness of a reduction can take most of a year to declare itself.

There is a practical distinction that patients can apply themselves. A swelling cone is soft, does not have a discrete edge, and changes through the day, smaller in the morning and fuller by evening. A tissue cone is firm, has a defined margin, can be pinched as a fold with fat inside it, and looks the same at breakfast as at dinner. If a lateral bulge at four months meets the second description, it will need revising, and there is no harm in the surgeon saying so at four months while still scheduling for six. What a surgeon should not do is dismiss it as swelling at every visit until the patient stops asking.

Seromas complicate the picture. A fluid collection at the lateral end of a tummy tuck, which the piece on seromas covers, can present as a soft, fluctuant fullness that patients mistake for a dog-ear and that surgeons occasionally mistake for one too. It is drained with a needle, not excised, and a surgeon who examines a lateral fullness should distinguish fluid from fat before anything is planned.

The revision, who pays, and what it cannot fix

The short answer: a dog-ear revision is a short procedure, usually under local anesthesia in the office, in which the surgeon extends the scar past the cone, excises the excess skin and fat as a tapering ellipse, sometimes suctions the fat beneath, and closes flat; most surgeons perform it at six to twelve months; many waive their own fee for it in the first year while charging for the room and materials; and it fixes a cone at the end of a scar but does not fix a flank, a back roll, or a lateral chest that needed a longer operation from the start.

The operation is simple in the way a good tailor's alteration is simple. The surgeon marks the cone with the patient standing, draws a new ellipse that begins on the old scar and runs past the end of the cone, tapers it to a point, removes the skin and the fat inside, and closes. If the cone is mostly fat with little skin surplus, liposuction through a small stab incision at the end of the scar may be enough on its own and leaves almost no new scar. If it is mostly skin, excision is needed and the scar is extended by however far the excess ran, which is typically a few centimetres. The whole procedure takes well under an hour, is done with local anesthetic, and has the recovery of a small wound: a week of dressings, a few weeks of avoiding stretch, and a new scar to mature over the following year.

The economics are less simple, and they are the part of the story the piece on the revision consult economy is about. Dog-ear revision is minor enough that it is routinely handled inside a surgeon's own practice rather than referred out, and most surgeons regard a revision for a cone they knew might form as part of the original job. The common arrangement is that the surgeon's fee is waived within the first year and the patient pays the facility and supply costs, which for an office procedure under local are modest. Some practices include a revision explicitly in the surgical quote. Some charge in full. The arrangement should be in writing before the first operation, because at month seven the leverage has changed and the patient is asking a favour rather than exercising a term.

Published data on how often it happens is thinner than the frequency of the problem would suggest, because dog-ears are minor complications and the large safety databases do not capture them. The largest abdominoplasty safety analysis in the literature, drawn from the CosmetAssure insurance database and published in Plastic and Reconstructive Surgery in 2015, examined more than 25,000 abdominoplasties and reported a major complication rate of about four percent, which covered hematoma, infection, clots, and other events serious enough to need a hospital; dog-ears do not appear in it at all. The figure that does exist is a surgeon's own revision rate, and it is one of the questions worth asking directly. In single-surgeon series of body-contouring after weight loss, revision rates for any reason commonly run in the range of one in five to one in three, with lateral excess and dog-ears among the leading indications. On a thin patient having a standard abdominoplasty, a good surgeon's rate should be well under one in ten. A surgeon who says it never happens has not counted.

What the revision cannot fix is the more important thing to understand. Excising a cone at the end of a scar addresses a few centimetres of tissue. It does not address a flank roll that extends toward the back, a lateral chest fold that runs under the arm, or a thigh whose excess continues below the crease. Those are not dog-ears; they are the residual of an operation that stopped short of the excess, and they need the longer operation that was not done, or the liposuction that was not included, rather than a bigger Burow's triangle. Patients are sometimes told that a revision will tidy up the ends when what they actually have is a second procedure of some size, and the honest surgeon says so at the first postoperative consultation, not the fourth.

The last thing the revision cannot fix is the scar's length. A dog-ear revision always extends the scar. A patient who chose a surgeon because that surgeon promised a short scar, and who then needs a revision at each end, finishes with the scar the longer operation would have given them, plus a second recovery and a second set of scar ends, each of which has its own small risk of doing the same thing again. That is the trade, closed out in full, and it is the reason a longer scar drawn correctly the first time is usually the better bargain.

The honest summary

A dog-ear at the end of a body-contouring scar is a predictable consequence of closing a long ellipse across a curved, fatty surface, and after a tummy tuck it is the most common reason a patient returns to the operating room. It forms at the hip after an abdominoplasty, at the armpit after an arm lift, in the groin after a thigh lift, and at the outer end of the fold scar after a breast reduction. It is bigger when the scar is stopped short of the excess, when the fat under the end is left in place, and when the operation chosen was smaller than the patient's tissue required.

The surgeon prevents it with a longer scar, tapered ends, an even closure, liposuction of the lateral fat, and the right operation to begin with, and every one of those tools costs the patient something: scar, time, or both. The decision to accept a cone in exchange for a shorter scar is a legitimate one, provided the patient makes it knowingly. It is usually made silently and on their behalf.

The cone that appears in the first weeks is mostly swelling and stiff scar, and it settles over three to six months. The one that is still standing at six months, firm, with a pinch of fat inside, is real, and it is revised under local anesthesia in the office in under an hour, with a slightly longer scar as the price. Get the revision terms in writing before the first operation. Ask to see the ends of the scar in the surgeon's photographs, from the side and behind, at six months. And ask, while the marks are still on your skin, where the scar will end and what will be left past it. That is the one question that turns a surprise into a choice.