What are the recent advances in reconstructive techniques after hemiglossectomy and modified radical neck dissection in adult patients?

Recent Advances in Reconstruction After Hemiglossectomy and MRND

Free vascularized flaps, particularly fasciocutaneous flaps like the radial forearm and anterolateral thigh flaps, represent the current gold standard for reconstruction after hemiglossectomy and modified radical neck dissection, with success rates exceeding 90% even in previously dissected necks. 1, 2

Primary Reconstructive Approach

Microvascular Free Tissue Transfer

• Free flaps are the preferred reconstructive option when systemic conditions permit, offering superior versatility and functional outcomes compared to pedicled alternatives 1

• Success rates are excellent, with free flap survival of 92% reported in large multi-institutional series, even in complex reconstructive scenarios 1

• Previous neck dissection is not a contraindication to microvascular reconstruction—free flaps remain highly successful despite relative paucity of recipient vessels in previously dissected necks 2

Optimal Flap Selection for Hemiglossectomy

Fasciocutaneous flaps are particularly well-suited for tongue reconstruction:

• Radial forearm flap remains a workhorse for oral cavity reconstruction, providing thin, pliable tissue ideal for tongue mobility and speech 3

• Anterolateral thigh flap offers larger tissue volume when needed, with reliable vascular anatomy 3

• These flaps provide good functional outcomes for swallowing, speech, and quality of life 3

Recipient Vessel Strategy After MRND

Critical technical considerations for microvascular anastomosis:

• Contralateral recipient vessels should always be used in patients with history of modified radical or radical neck dissection 2

• Ipsilateral vessels in the field of previous selective neck dissection can be used in approximately half of cases 2

• Long vascular pedicle flaps are heavily relied upon to reach appropriate recipient vessels without requiring vein grafts 2

• Vein grafts were not necessary in contemporary series, likely contributing to the absence of flap failures 2

Emerging Innovations

Patient-Specific 3D Planning

The PANSOFOS (Personalised pAtient-specific plaNning of SOFt tissue recOnStruction) technique represents a novel advancement:

• 3D printing and software create customized silicone resection and flap harvesting guides based on preoperative imaging 4

• Negative silicone molds control flap bulk to match the specific defect geometry 4

• Early results demonstrate excellent oncological, cosmetic, and functional outcomes with enhanced recovery and safe swallowing 4

• This technique is currently at IDEAL Stage 1 (proof of concept) and requires further validation 4

Alternative Reconstructive Options

Pedicled flaps have limited but specific applications:

• Pectoralis major myocutaneous flap shows 96.4% success rate but may result in facial asymmetry and malocclusion 1

• Smaller pedicled flaps (sternocleidomastoid, facial artery) have restricted applications 1

• Consider pedicled flaps when free flap resources are unavailable, patient medical status is compromised, or as salvage after failed definitive therapy 1

Surgical Planning Principles

Multidisciplinary Coordination

• Surgical procedure, margins, and reconstructive plan must be developed prospectively to resect all gross tumor with adequate tumor-free margins 5

• En bloc resection with in-continuity neck dissection is necessary when primary tumor extends directly into the neck 5

Margin Assessment

• Clear margins are defined as ≥5 mm from the invasive tumor front to the resected margin 5

• Frozen section margin assessment should be considered when it facilitates complete tumor removal 5

• Adequate excision typically requires 1.5-2 cm clearance from gross tumor 5

Common Pitfalls and Caveats

Technical considerations to optimize outcomes:

• Avoid excessive tension on arterial anastomoses—one case requiring urgent revision in contemporary series highlights this risk 2

• Most common complications include wound site infection (20-47%), metal exposure, and fistulation even with successful flaps 1

• Heavy reliance on flaps with long vascular pedicles obviates need for vein grafts and likely contributes to high success rates 2

Functional Outcomes

Modern reconstructive techniques prioritize:

• Restoration of swallowing function with safe oral intake 4

• Speech preservation through appropriate tissue selection and contouring 3

• Enhanced recovery pathways with early discharge when reconstruction is optimized 4