The anterolateral thigh flap, usually shortened to ALT, is a sheet of skin and fat from the outer front of the thigh. Surgeons reach for it more than any other flap when a large area anywhere on the body needs living cover.
An ALT flap takes skin and fat from the outer thigh together with the small vessel that feeds it. That tissue is moved to the area being rebuilt and its artery and vein are joined to vessels there under a microscope. It can be thinned, folded or made larger so it matches the gap.
Skin and fat over the outer front of the thigh are fed by small vessels that rise from a deeper artery in the thigh. Surgeons can trace one or two of these vessels back to their source, then lift the overlying skin and fat as a flap while leaving the thigh muscles in place. That is why the ALT is described as a perforator flap.
Its main strength is versatility. The piece taken can be narrow and thin for lining inside the mouth, or wide and bulky for a deep wound in the leg. Where more support is needed, a strip of tough fascia can be included, and a segment of muscle can be added when dead space has to be filled.
Most donor sites close directly, leaving a straight scar down the thigh. Wider flaps sometimes need a skin graft to close, which leaves a patch of different texture and colour. Numbness beside the scar is usual because small skin nerves are divided while the flap is raised.
This flap suits large or awkward defects that need living skin and fat rather than a graft, in people fit enough for microsurgery.
A handheld doppler probe, and sometimes a scan, locates the perforating vessels on the thigh. Marks on the skin guide where the flap will be designed so the strongest vessel sits within it.
Dead tissue, scar or tumour margins are cleared until healthy tissue is reached. Nearby artery and vein are then exposed and checked for good flow before the flap is committed.
The surgeon opens the thigh, follows the chosen perforator carefully through or between muscle fibres, and frees the skin island on its vessel without disturbing the muscle itself.
Vessels are divided, the flap is moved and the artery and vein are stitched to the recipient vessels under a microscope. Flow is watched until the tissue pinks up reliably.
Tissue is trimmed and stitched into the defect, drains are placed and the thigh is closed. A skin graft covers the donor site when direct closure would pull too tightly.
The flap is checked constantly for colour, warmth and refill. Pressure on it is avoided, the limb or head is positioned carefully and fluids are kept up to protect blood flow.
Sutures and drains come out as swelling drops. Standing and walking begin with help, and the thigh may feel tight, bruised or oddly numb around the scar.
Most day to day activity is possible again for many people. Scars are still red and firm, and any grafted patch on the thigh needs moisturiser and sun protection.
Bulk usually settles as swelling resolves, and thinning or scar revision can be discussed if the flap sits proud. Numbness on the thigh often shrinks slowly.
Expect a healed, durable cover that protects what lies underneath rather than a match for the surrounding skin. Colour and texture differ, and the flap often looks bulky at first before swelling settles. Many people later choose a small thinning or scar revision procedure. On the thigh a visible line remains, wider or paler where a graft was needed, and a numb patch beside it is common.
Microsurgery is reliable in trained hands, yet problems do happen and are worth understanding early.
The rebuilt area gets most of the attention, but the thigh heals better when it is looked after just as carefully.
Muscles stay where they are during this operation, so walking usually returns to normal once the wound has healed.
Transferred tissue keeps the colour and thickness of the thigh, so a visible difference is expected and is planned for.
Early bulk is mostly swelling. Tissue settles over months, and a minor thinning procedure can refine it later if needed.
Tracing a perforator through muscle takes microsurgical training, magnification and a team set up for close monitoring afterwards.
At Elegance Clinic in Surat, reconstructive planning starts with the defect and the person, then works back to the donor site that costs the least. Options are laid out in plain language before any date is fixed.
Technique pages such as this one do not carry their own price, because the cost depends entirely on the treatment the ALT flap is used within. Head and neck reconstruction, limb salvage and burn release each involve different theatre time, implants and hospital stay.
After assessment you receive a written estimate, and the matching treatment page shows the usual band.
These are the questions that come up most often in consultation. If yours is not here, send it on WhatsApp and the team will reply, usually the same day.
Ask your question →There is no single price for a technique. Cost follows the operation it forms part of, along with theatre time, hospital stay, dressings and any later refinement. A written estimate is prepared once the plan has been agreed at consultation.
Microsurgery is well established, though it is long surgery with genuine risks including bleeding, infection, clots and failure of the joined vessels. Careful patient selection, tight monitoring and prompt action if flow drops are how those risks are managed.
Most people stand within days and walk gradually further after that, though this can vary. Tightness in the thigh eases over weeks. Running, squatting and heavy lifting wait until the wound and any graft are fully settled.
Not exactly. Thigh skin keeps its own colour, thickness and hair pattern wherever it is moved. The aim is durable cover and restored function first, with thinning or scar revision available later to improve appearance.
Smoking narrows the small vessels this flap depends on and raises the chance of flap loss and wound breakdown. Surgery is usually delayed until tobacco and nicotine have been stopped, and support to quit is offered as part of planning.
Wounds are usually cleaned and dead tissue removed first, sometimes more than once. Reconstruction follows when the bed is healthy and swelling has settled. Timing is judged case by case rather than by a fixed rule.
Bring any previous operation notes, discharge summaries, scans and a current medicine list. Mention diabetes, blood thinners, heart or kidney problems and tobacco use, since each of these changes planning and the safety checks before surgery.
Seeing patients from across the city and beyond: read about the practice on the plastic surgeon in Surat page, or check what a written estimate covers on the costs and insurance page.
