What are the recommended techniques for closing the fascia and skin following a parotidectomy?

Closure Techniques After Parotidectomy

The provided guidelines do not specifically address fascia and skin closure techniques following parotidectomy, as they focus primarily on the extent of resection, margin assessment, and facial nerve management 1. However, based on available research evidence, use layered closure with subcutaneous synthesis and consider reconstruction techniques to prevent contour deformities and complications like Frey syndrome.

Skin Incision and Closure Approach

For optimal aesthetic outcomes, use modified incisions (periauricular, face-lift type, or modified Blair) with meticulous layered closure rather than traditional bayonet-shaped incisions. Research demonstrates that:

• Periauricular incisions provide excellent cosmetic results with almost imperceptible scars at 6 months, though temporary hypoesthesia occurs universally 2
• Face-lift incisions with SMAS flap yield superior aesthetic outcomes with high patient satisfaction (scores 8-10/10) and symmetric facial contour 3
• Modified cervicofacial incisions successfully accommodate all benign and malignant parotid procedures without requiring extension 4

Closure Technique Details

Perform subcutaneous synthesis without skin sutures when using periauricular approaches 2. This technique:

• Minimizes visible scarring
• Maintains good wound healing
• Achieves high patient satisfaction

Fascia and Volume Reconstruction

Address the parotidectomy defect with volume replacement to prevent retromandibular depression and improve contour. The evidence supports several options:

Primary Reconstruction Options (in order of preference based on outcomes):

1. En-bloc fat grafting - Provides the best aesthetic satisfaction (VAS 3.83/5 at 12 months) with minimal morbidity and lower Frey syndrome rates. Overcorrect by approximately 20-30% to account for resorption 5, 6

2. Parotid fascia flap - When preserving fascia overlying the tumor is feasible, raise a fascia flap from beneath the ear lobe and suture it firmly in place after tumor resection. This significantly reduces fistula formation (0% vs 13.3% in controls, p=0.049) 7

3. Partial-thickness superiorly-based sternocleidomastoid muscle flap - Provides adequate filling with minimal donor site morbidity and reduced Frey syndrome risk, though aesthetic outcomes are inferior to fat grafting 5, 6

4. SMAS flap (when using face-lift incision) - Prevents Frey syndrome and maintains facial contour 3

For Extensive Defects After Total Parotidectomy

Consider adipofascial infragluteal perforator (AIGP) free flap for total parotidectomy defects, particularly when:

• Facial nerve is preserved creating a two-compartment defect
• Adjuvant radiotherapy is planned
• Significant volume restoration is needed

This technique offers concealed donor site scarring and satisfactory contour restoration 8.

Critical Technical Points

Margin Assessment (per NCCN guidelines)

• Clear margins are ≥5mm from invasive tumor front 9
• Close margins are <5mm
• Frozen section guidance is appropriate when margins are <2cm from gross tumor 9

Reconstruction Principles

• Do not compromise margin adequacy for primary closure 9
• Reconstruction should be performed "at the discretion of the surgeon" but should not sacrifice oncologic principles 9
• For malignant cases requiring facial nerve preservation, the ASCO guidelines emphasize that achieving negative margins improves overall survival, but functional preservation is paramount when a dissection plane exists 1

Common Pitfalls to Avoid

1. Inadequate volume replacement - Leads to retromandibular depression and poor aesthetic outcomes
2. Excising parotid fascia unnecessarily - Increases fistula risk from 0% to 13.3% 7
3. Using traditional bayonet incisions - Results in visible scarring and patient dissatisfaction
4. Insufficient fat overcorrection - When using fat grafts, undercorrection leads to suboptimal long-term contour 5, 6
5. Compromising margins for cosmesis - Oncologic outcomes must take priority over aesthetic considerations

Facial Nerve Considerations

If facial nerve sacrifice is required for malignancy, perform immediate microsurgical reconstruction with cable grafting or masseteric nerve transfer (which provides earlier reinnervation at 4-6 months vs 6-13 months for cable grafts) 10. Postoperative radiotherapy does not impair graft function 10.