Head and Neck Cancer / Free-Flap Reconstruction | Donor tissues and reconstructive design

Radial forearm free-flap tissue is thin and supple, so it can recreate oral lining and help preserve tongue mobility for speech and swallowing. It is commonly used for partial glossectomy defects when the tongue base and suprahyoid muscles are preserved and extra bulk is unnecessary. It can also line floor-of-mouth, buccal mucosa or retromolar defects, and may allow sensory reinnervation. The flap has a reliable blood supply, but donor-site skin grafting and possible numbness or tendon problems are trade-offs. Because the flap is thin, it conforms to oral contours and may facilitate dental restoration. It is also useful for floor-of-mouth defects extending toward the upper neck, where thin supple lining helps seal the oral cavity and recreate the lingual sulcus.

Free flaps let surgeons match tissue characteristics to the defect. The anterolateral thigh flap is a common workhorse for head and neck soft-tissue reconstruction, with low donor-site morbidity and fistula rate; it can be shaped into a tube for throat reconstruction and may include a second skin paddle when blood-vessel anatomy allows. If thigh tissue is unsuitable, such as excessive thigh fat or absent reliable perforators, another flap may be considered. Surgeons can also tailor flaps thin and pliable or bulky and padded, and reconstruct skin, oral lining, muscle, cartilage or bone as needed. It is especially useful for larger soft-tissue defects and can be tailored to the patient's needs.

After cancer removal, the jaw defect is repaired with tissue matched to the missing bone and lining. The fibula can provide enough length for large jaw defects, including hemimandibulectomy or angle-to-angle defects, and can be divided into segments and shaped, then fixed in place. It can tolerate multiple osteotomies. Its blood supply is reconnected microsurgically so the bone stays alive. A skin paddle may also replace mouth lining or neck skin when needed. The approach varies with defect size, location, soft-tissue loss and whether chewing, speech and swallowing need restoration. Surgeons may also consider whether dental restoration is planned, because jaw height and contour affect chewing, appearance and function.

After tumor removal, the defect may include skin, oral lining, muscle, cartilage or bone. Free tissue transfer can provide these tissues in one operation, with improved blood supply compared with non-vascularized grafts or implants. Surgeons can tailor thickness and padding to the defect more precisely, and a single composite flap can restore both surface and bony support. Composite flaps may include skin, oral lining, muscle, cartilage and bone; surgeons can make them thin and pliable or bulky and padded. The final plan is individualized after assessing defect size, location, donor-site suitability, prior radiation or surgery, and overall health, not one standard plan.

The assessment looks for clues that the peroneal artery and accompanying veins may be unreliable, such as prior trauma, deep vein thrombosis, peripheral vascular disease, diabetes or hypertension. Distal pulses are palpated; legs and feet are checked for warmth and hair growth. If pulses are impalpable or vascular disease or trauma is suspected, duplex ultrasound, CT angiography, MR angiography or arteriography may be used to confirm the pedicle. Some groups consider thorough exam plus noninvasive Doppler enough, while others favor angiography for its sensitivity. Normal popliteal branching occurs in 92.2% of cases, and 0.2% to 8% of people have a dominant peroneal artery supplying the foot, so imaging can matter.

Before surgery, the software can change CT images to plan the bone removal and rebuilding. Cutting guides carry that plan to the jaw bone and the donor bone, while navigation can compare the real position with the planned one. The plan may be overlaid on preoperative CT data to check positioning. This can reduce trial and error and improve accuracy. Prebending hardware and simplifying osteotomies may save operative time. In select cases, surgeons may combine this with intraoperative stereotactic navigation when exposure is limited. Even a few millimetres of malposition in a vascularized bone flap can affect bite or facial landmarks, so precise placement matters.

In bone-containing reconstruction, plates may support the jaw or facial skeleton. Some patients later need removal of jaw-supporting plates 12 to 18 months after surgery to prevent exposure through the external skin, along with flap debulking or monitoring-paddle removal. Dental implants may be placed primarily, allowing early rehabilitation before radiotherapy effects, or secondarily after cancer treatment, allowing more assessment but possibly reduced bone joining in irradiated tissue. Prostheses may be retained with implants, adhesives or spectacles. The choice depends on disease status, oral function, patient motivation and prosthetic planning. Radiotherapy can also affect tissue healing and implant success. Your surgeon will individualise timing and follow-up carefully for your case as clinically appropriate.

Speech clarity depends on mobilizing residual native tongue, while swallowing depends more on reconstructed volume. For smaller resections, a thin pliable flap is preferred, with careful placement so the remaining tongue is not tethered. For larger defects, a bulkier flap may be used. If less than 30% of oral tongue is removed, primary closure may fare better in selected patients. If half the base of tongue remains, function is often well preserved; near-total or total base resections rely more on soft palate and throat wall movement, so a sufficient mound is created. Bulky flaps may later be thinned if excess bulk affects speech or swallowing.

A free flap moves living tissue with its blood supply to rebuild the defect after cancer removal. Whether the donor site needs grafting depends on flap type and wound size. For example, radial forearm donor sites are closed directly only when small; larger wounds may be resurfaced with a full-thickness or split-thickness skin graft. Free muscle flaps also need skin grafting. When grafts are used, full-thickness grafts are often preferred for appearance and a smaller donor scar, though grafts can bring color mismatch, stiffness and a second donor site. The surgeon tailors flap thickness and bulk to the defect, and donor-site management is part of that plan.

Free-flap reconstruction moves living tissue with its blood vessels to repair a head and neck defect after cancer removal. The donor site is chosen according to body build, physical examination and surgeon preference; for a lower-leg flap, an abnormal pulse examination may prompt imaging of lower-leg vessels. Forearm harvest can leave reduced grip strength, altered sensation in the radial nerve area, cold intolerance, or radius fracture if bone is taken. Shoulder-blade donor sites usually close directly, though skin grafting is difficult because of shoulder movement. Buttock donor sites can feel tight during hip bending and sitting. Donor-site effects vary by flap and patient.