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Procedure guide · Reconstructive Plastic Surgery
Reconstructive Fat GraftingReconstructive fat grafting moves small volumes of the patient’s own fat into contour defects after cancer surgery, trauma or burns, and into areas damaged by radiotherapy. Beyond adding volume it appears to improve the quality of irradiated and scarred skin, softening it and improving its blood supply. Part of every graft is reabsorbed, so several sessions are usual rather than exceptional.
Reconstructive fat grafting is frequently confused with its cosmetic namesake, and the difference matters more than the shared name suggests. Cosmetic fat transfer moves large volumes in one or two sessions to enlarge a buttock or a breast. Reconstructive fat grafting moves small volumes, repeatedly, into contour defects after cancer surgery, trauma or burns, and into tissue damaged by radiotherapy. Its most interesting property is not the volume it adds but what it appears to do to the tissue it is placed into.
Grafting into skin damaged by radiotherapy softens it, improves its blood supply and reduces pain, and in some cases makes reconstruction possible in a bed that would otherwise be too hostile for it. The effect is attributed to regenerative cells within the fat rather than to the volume itself, it is still being studied, and it is used clinically because the benefit is observed reliably enough in practice. Patients treated for that reason frequently notice the area feels different before it looks different.
Technique determines survival more than anything else, and it explains why a good fat grafting operation is slow. Fat has no blood supply when it is moved, so every parcel of it must be close enough to well-supplied tissue to be nourished until new vessels grow in. A large bolus of fat dies in the middle and forms an oil cyst; small parcels spread through healthy tissue in many passes at different depths survive. Harvesting is done gently by hand rather than with aggressive suction, because the fat cells themselves have to survive the journey.
Even done well, survival is partial and unpredictable. Somewhere between a third and two thirds of grafted fat typically persists, varying between patients and between sessions in the same patient, and it cannot be forecast from anything measurable beforehand. Survival is lower in scarred and irradiated tissue, which is precisely where grafting is most wanted, so more sessions are needed in exactly the cases that need it most.
That makes reconstructive fat grafting a series rather than a procedure. Two to four sessions, 3 to 6 months apart, building the result gradually, with each session judged at 6 months once survival has declared itself. Patients expecting one operation are consistently disappointed; patients expecting three are usually pleased. The volume drop between 2 weeks and 3 months, when swelling resolves and a proportion of the graft is reabsorbed, is the moment that most needs explaining in advance.
One issue applies specifically to the breast and deserves stating clearly. Grafted fat that does not survive can calcify, and those calcifications show on mammograms. Experienced breast radiologists distinguish them reliably from cancer, but they complicate surveillance and can prompt further imaging or biopsy. Fat necrosis also produces firm lumps that need distinguishing from recurrence. None of this is a reason to avoid grafting after breast reconstruction, where it is genuinely useful, but it is a reason to tell whoever reads your mammograms that you have had it.
The safety question after cancer has been studied extensively. The theoretical concern, that regenerative cells within grafted fat might stimulate residual tumour, has not translated into an observed increase in recurrence in large studies. It is nonetheless usually deferred until cancer treatment is complete and margins are confirmed clear, and the timing is agreed with the oncology team rather than arranged independently.
For travelling, this is among the better-suited procedures in the category. It is short, usually a day case, the aftercare is light, and flying is cleared within a few days. The complication is that it takes several sessions months apart, so it means repeated trips rather than one, and where it follows cancer treatment the coordination with the oncology team matters more than the surgery does.
Reconstructive fat grafting works on a simple biological constraint: transferred fat has no blood supply of its own and must acquire one from the surrounding tissue within days. Everything that distinguishes good technique from poor follows from that. Fat placed in fine threads through multiple passes has a large surface area in contact with living tissue and survives; the same volume injected as a single pocket outlives its oxygen supply in the centre and dies, forming oil cysts and firm lumps. This is why the operation takes longer than the volumes involved suggest.
Reconstructive fat grafting delivers a partial and somewhat unpredictable take, and the honest range is wide. Between 40 and 70 per cent of the transferred volume typically survives, settling by around 4 months, after which what remains is generally permanent. Surgeons compensate by over-filling deliberately, which means the result looks excessive for the first weeks. Judging the outcome before 4 months is the most common source of unnecessary anxiety, and an unnecessary second procedure booked too early is a real risk.
Reconstructive fat grafting has become one of the most widely used tools in the speciality because it addresses problems that older techniques handled badly. It restores contour after a lumpectomy, softens a tight scar, fills a hollow after tissue loss, improves the appearance of a graft edge, and adds cover over an implant. It is used in facial palsy, in hemifacial atrophy, in burn scars and in the depressions left by trauma. Its limitation is that it adds soft volume and nothing else: it will not replace a missing structure or provide support.
Reconstructive fat grafting is frequently described in marketing terms that outrun the evidence, particularly around stem cells. Fat does contain regenerative cells, and there is credible research into their effects on scar tissue and wound healing. That is a long way from the claims sometimes made for enriched or stem cell fat transfer, which are not supported by the quality of evidence used to license other treatments. Ordinary, carefully performed fat grafting is a genuinely useful technique, and claims that go beyond it should be treated with caution.
Reconstructive fat grafting is attractive partly because its downside is modest. If a graft largely fails to take, the patient has lost a day, has a sore donor site for a fortnight and can have the procedure repeated. Compared with a flap, where failure means losing the transferred tissue and frequently a further operation, that is a low-risk proposition. It is one reason fat grafting has spread so quickly into problems that were previously managed with much larger surgery.
Reconstructive fat grafting complications are uncommon but real. Oil cysts and firm nodules occur where fat has been placed too densely, fat necrosis can be felt as a hard lump and may need imaging to distinguish from a recurrence in a cancer patient, and infection is rare. Injection into a blood vessel is a serious event that has been reported around the face, and it is the reason surgeons inject slowly with blunt cannulas while withdrawing rather than advancing.
Reconstructive fat grafting requires a donor site with enough fat, which excludes a small number of patients. A very lean person may not have 200 millilitres to spare, and repeated grafting draws on the same reserves. Significant weight change after the procedure also alters the result, since grafted fat behaves like the fat it came from and grows or shrinks with the body. A stable weight before and after is worth aiming for.
Reconstructive fat grafting is frequently used alongside other procedures rather than by itself. It fills the contour irregularities at the edge of a flap, softens a scar before a revision, adds cover over an implant in a thin patient, and refines a breast reconstruction after the main operation has healed. Planning it as a refinement stage 3 to 6 months after a larger reconstruction is a common and sensible sequence.
Reconstructive fat grafting recovery is dominated by the donor site rather than by the recipient area. Bruising and tenderness where the fat was harvested last 2 to 3 weeks, with compression worn for part of that. The grafted area is swollen for a similar period and must not be pressed, massaged or slept on, since pressure in the first weeks reduces how much of the graft survives.
Surgeons look for these points at the consultation.
Reconstructive fat grafting suits people with contour defects after cancer surgery, trauma or burns, with irradiated or scarred skin that is tight and painful, or with facial volume loss from disease, who have enough donor fat and who accept that several sessions are usually needed.
Reasons a good surgeon will ask you to wait or choose something else.
Reconstructive fat grafting is deferred where cancer margins are unconfirmed or disease is active, in active infection, in current smokers, where there is insufficient donor fat, in unstable weight, and where the volume required is large enough that a flap or implant would serve better.
Ask your surgeon which technique they recommend for you and why.
Fat is harvested gently by hand, processed to remove fluid and oil, and injected in very small amounts through fine cannulae in multiple passes and layers.
Repeated small-volume grafting into skin damaged by radiotherapy, which appears to soften it, improve its blood supply and reduce pain over several sessions.
Restoring volume lost to conditions such as hemifacial atrophy, or after trauma and tumour surgery, building the face up over several staged sessions.
Using a solid implant or moving vascularised tissue where a large, predictable volume is needed rather than a gradual build-up.
Step by step, from arrival to discharge.
The defect is assessed for volume and tissue quality, the donor site chosen, and the likely number of sessions discussed before the first is booked.
Fat is taken by hand with low suction from the abdomen, flanks or thighs, because aggressive suction destroys the fat cells that need to survive.
The harvested fat is processed to remove fluid, blood and oil, leaving viable fat ready to be injected.
Fat is injected in very small amounts through fine cannulae in multiple passes at different depths, so each parcel sits against well-supplied tissue.
A day case in most cases. The grafted area is protected from pressure for a few weeks and a compression garment is worn over the donor site.
Survival is judged at 6 months, once reabsorption has finished, and the next session planned from there.
Frequencies follow published guidance; your personal risk depends on your health and the surgeon.
Reconstructive fat grafting is frequently confused with its cosmetic namesake, and the difference matters. Cosmetic fat transfer moves large volumes to enlarge a buttock or a breast. Reconstructive fat grafting moves small volumes, repeatedly, into contour defects and scarred beds, and its most interesting property is not the volume it adds but what it appears to do to the tissue it is placed into. Grafting into skin damaged by radiotherapy softens it, improves its blood supply and reduces pain, and in some cases makes reconstruction possible in a bed that would otherwise be hostile to it.
Technique determines survival more than anything else. Fat has no blood supply when it is moved, so every parcel of it must be close enough to well-supplied tissue to be nourished until new vessels grow in. That is why surgeons inject tiny amounts in many passes at different depths rather than depositing a bolus: a large lump of fat dies in the middle and forms an oil cyst, while small parcels spread through healthy tissue survive. It is slow, painstaking work and it is the difference between a graft that takes and one that does not.
Even done well, survival is partial and unpredictable. Somewhere between a third and two thirds of grafted fat typically persists, varying between patients and between sessions in the same patient, and it cannot be forecast. Reconstructive fat grafting is therefore a series rather than a single procedure, with sessions months apart building the result gradually. Patients expecting one operation are consistently disappointed; patients expecting three are usually pleased.
One specific issue applies to the breast. Grafted fat that does not survive can calcify, and those calcifications show on mammograms. Experienced breast radiologists distinguish them reliably from cancer, but it complicates surveillance and can prompt further imaging or biopsy. It is not a reason to avoid grafting after breast reconstruction, where it is genuinely useful, but it is a reason to tell whoever reads your mammograms that you have had it.
A proportion of every graft is reabsorbed over the first 6 months, the proportion varies between patients and sessions, and it cannot be predicted in advance.
Because survival is partial, reconstructive fat grafting is normally a series of procedures months apart rather than a single operation.
Grafted fat that does not survive can form firm lumps or oil cysts. They are benign but, in a reconstructed breast, need distinguishing from recurrence by imaging.
Bruising and soreness where fat was harvested, and occasionally a contour irregularity if too much was taken from one area.
Calcium deposits where fat has been reabsorbed, which show on mammograms. Experienced radiologists distinguish them from cancer, but they complicate surveillance.
Survival is lower where the bed is scarred or irradiated, which is precisely where grafting is most wanted, so more sessions are needed in exactly those cases.
Infection at the graft or donor site, treated with antibiotics and occasionally requiring drainage.
Recovery from reconstructive fat grafting is short and the donor site is usually the sorer part. Fat is harvested by liposuction, which leaves bruising and a deep ache for a week or two, and a compression garment is worn over that area. The grafted site is swollen and looks over-filled for the first fortnight, which reassures patients early and then disappoints them as it settles.
Protecting the graft matters more than the discomfort suggests. Grafted fat needs to develop a blood supply in its new position, and sustained pressure in the first weeks reduces how much survives. That means avoiding pressure on the area, including sleeping position where relevant, for around 2 to 4 weeks.
The volume drop between week 2 and month 3 is the part that needs explaining in advance. Swelling accounts for some of the early fullness and a real proportion of the graft is reabsorbed after that. What is present at 6 months is what has survived, and judging the result earlier is misleading in both directions.
Where grafting is being used to improve irradiated or scarred tissue rather than to add volume, the change is slower and subtler: the skin becomes softer, more mobile and less painful over months, and frequently improves further with each session. Patients treated for that reason often notice the change in how the area feels before they notice any change in how it looks.
Days 1-3
The grafted area looks over-filled and both sites are bruised. The donor site is frequently the sorer of the two. Pressure on the graft is avoided.
Days 4-14
Bruising fades and the over-filled appearance reduces. A compression garment is worn over the donor site. Flying is usually cleared at around day 5.
Weeks 3-8
Part of the graft is reabsorbed and the volume drops from its early peak. This is expected and is not a sign the graft has failed.
Months 3-6
What remains at 6 months is what has survived. Tissue quality in irradiated areas continues improving. The next session is planned from here.
Months 6-12
Volume is stable. Further sessions build toward the final contour, with the complete result usually a year or more after the first.
Reconstructive fat grafting builds volume gradually across sessions rather than arriving at once. The area looks over-filled for the first fortnight, then swelling resolves and a proportion of the graft is reabsorbed over the following months.
What is present at 6 months is what has survived. Judging earlier is misleading in both directions, and the complete result is usually a year or more after the first session.
Where grafting is used to improve irradiated or scarred tissue, the change is subtler and slower: the skin becomes softer, more mobile and less painful over months, frequently improving further with each session.
Firm lumps from fat that did not survive occur in a proportion of cases. They are benign, and in a reconstructed breast they need distinguishing from recurrence by imaging.
Reconstructive fat grafting is priced per session, and the honest figure is the sum of the two to four sessions most patients need rather than the cost of one. The prices on this site come from verified clinic records for a single session.
Where it forms part of reconstruction after cancer, burns or trauma, it is frequently funded, particularly as a refinement to breast reconstruction where it is now a standard final stage. That is worth establishing before paying privately.
For anyone travelling, the cost that changes the calculation is repeated trips. Sessions are 3 to 6 months apart, so a plan of three sessions means three journeys, and pricing it as one procedure understates it by a factor of three.
Why quotes for the same procedure differ, so you can compare packages fairly.
Options to weigh before deciding, surgical and non-surgical.
Where a large predictable volume is needed, moving vascularised tissue achieves in one operation what grafting cannot across several.
A single predictable volume where the tissue can cover it, at the cost of the risks any implant carries over time.
Reasonable where the defect is modest and several sessions with unpredictable survival is not a trade worth making.
Where the problem is insufficient skin rather than insufficient volume, expansion addresses a different deficiency.
Where the aim is age-related facial volume restoration rather than reconstruction after disease or injury.
Ask the same questions at every consultation so you can compare answers.
Cosmetic fat transfer moves large volumes to enlarge a buttock or breast. Reconstructive fat grafting moves small volumes repeatedly into contour defects and damaged tissue, where the aim is to restore shape and improve tissue quality rather than to add bulk.
The technique differs accordingly: many tiny parcels placed through multiple passes rather than larger deposits. The same operation name covers two quite different procedures.
Reconstructive fat grafting has good evidence behind it here. Grafting into skin damaged by radiotherapy softens it, improves its blood supply and reduces pain, and in some cases makes later reconstruction possible in a bed that would otherwise be too hostile.
The mechanism is attributed to cells within the fat rather than to the volume itself, and it is still being studied. Results vary, and several sessions are usually needed for the effect to build.
Typically somewhere between a third and two thirds of reconstructive grafting volume survives, varying between patients and between sessions in the same patient. It cannot be predicted in advance, and survival is lower in scarred or irradiated beds.
That is why this is a series of sessions rather than one operation. Patients expecting a single procedure are consistently disappointed; those expecting two or three are usually pleased.
Usually two to four reconstructive fat grafting sessions, spaced 3 to 6 months apart, so the result builds gradually. Larger defects and heavily irradiated tissue need more.
Each session is judged at 6 months, once survival has declared itself, before the next is planned. The complete result is frequently a year or more after the first procedure.
Sometimes. Fat that does not survive reconstructive grafting can form firm lumps or oil cysts, which are benign. Careful technique, placing small parcels rather than boluses, reduces them considerably.
In a reconstructed breast they need distinguishing from recurrence, which usually means imaging. That is not a reason to avoid grafting, but it is a reason to tell your breast team you have had it.
Reconstructive fat grafting complicates surveillance somewhat. Reabsorbed fat can calcify and those calcifications show on mammograms, and fat necrosis produces lumps that need assessment.
Experienced breast radiologists distinguish these from cancer reliably. The practical requirement is that whoever reads your mammograms knows you have had fat grafting, so tell them rather than assuming it is recorded.
Enough to harvest, yes, though reconstructive grafting uses far smaller volumes than cosmetic transfer so the requirement is modest. Very slim patients occasionally have too little.
Weight should be stable, because grafted fat behaves like fat elsewhere and changes with body weight. Significant weight loss after grafting reduces the result.
Usually the abdomen, flanks or thighs, chosen for accessibility and for having enough fat to spare for reconstructive grafting. The donor site is bruised and sore for a week or two and a compression garment is worn.
The donor site is frequently the more uncomfortable of the two areas, which surprises patients focused on the reconstruction. Harvesting is gentle and by hand, because aggressive suction damages the fat cells.
For small to moderate contour defects, reconstructive fat grafting frequently substitutes for a flap, and with far less surgery. For large volume deficits it cannot, because the volume that can be grafted in one session is limited by survival.
It is also used alongside flaps, refining contour after a larger reconstruction has settled. In breast reconstruction it is a standard final refinement rather than an alternative.
Reconstructive fat grafting is widely used after cancer surgery and large studies have not shown an increase in recurrence. It is usually deferred until treatment is complete and margins are confirmed clear.
The theoretical concern, that cells within grafted fat could stimulate residual tumour, has been studied extensively without evidence of harm in practice. Discuss the timing with your oncology team rather than arranging it independently.
Reasonably, since reconstructive fat grafting is among the better-suited procedures in this category. It is short, the aftercare is light, and flying is cleared within a few days.
The complication is that it takes several sessions months apart, so it means repeated trips. Where it follows cancer treatment, coordination with the oncology team matters more than the surgery does.
Someone who describes their reconstructive grafting technique in terms of small parcels and multiple passes rather than volume injected, since that is what determines survival.
Ask how many sessions they expect, what proportion of graft they typically see survive, and how they handle fat necrosis if it occurs. Ask also to see results at 6 months rather than at 2 weeks.
Usually the abdomen, flanks or inner thighs, chosen for accessibility rather than for contouring. The volumes are small compared with liposuction for shaping, frequently under three hundred millilitres.
The donor site is sore and bruised for a week or two. Because only a small volume is taken, the shaping effect on the donor area is modest and should not be the reason for choosing a site.
Harvested fat is separated from blood, oil and anaesthetic fluid by settling, centrifugation or filtration, then transferred into small syringes. Techniques vary between surgeons and the evidence does not strongly favour one.
What does matter is gentle handling and placing the fat in fine threads rather than large pockets, so each parcel is close to a blood supply. That technique detail affects survival more than the processing method.
Reconstructive fat grafting has reasonable evidence for softening scar tissue and reducing pain in some scars, beyond the volume it adds, which is thought to relate to the regenerative cells within the fat.
It is used this way under tight burn scars and in painful post-mastectomy scarring. The effect is real but modest, and it is usually one part of a plan rather than the whole of it.
Current evidence does not show an increased risk of recurrence, and reconstructive fat grafting is widely used in breast surgery. It is discussed with the oncology team rather than decided by the plastic surgeon alone.
It can produce calcifications on mammograms that need distinguishing from cancer, so the radiologist should know it has been done. That is a surveillance issue rather than a safety one.
Two or three reconstructive fat grafting sessions are typical for a defect of any size, spaced 3 to 6 months apart, because only part of each graft survives and there is a limit to how much can be placed safely at once.
Plan for the series rather than the first session. Someone quoted a single operation for a large contour defect is being given an optimistic picture of what one graft achieves.
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