Deep Neck Contouring Surgery: A Comprehensive Guide

A COMPREHENSIVE GUIDE

A step-by-step surgical and anatomical guide to deep neck contouring including submandibular gland reduction, designed for surgeons and advanced aesthetic practitioners.

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Deep neck contouring surgery enhances the cervicomental angle and jawline definition by addressing the structures deep to the platysma, including subplatysmal fat and the submandibular glands. This resource outlines patient selection, surgical anatomy, a step-by-step technique, postoperative care, and safety considerations.

Sections:

• Introduction & Indications
• Key Deep Neck Anatomy
• Surgical Technique (Step-by-Step)
• Postoperative Care
• Outcomes and Aesthetic Benefits
• Complication Avoidance
• Key References

I. Introduction & Indications

Deep neck contouring is ideal for patients with submental fullness, ptotic submandibular glands, and a poorly defined jawline not improved with liposuction or platysmaplasty alone. Removal of submandibular glands and deep fat, when properly indicated, can create a crisp mandibular border and youthful neck angle.

II. Key Anatomical Landmarks

• Subplatysmal Fat: Located between platysma and deeper neck structures, often in the midline and lateral to the digastrics.
• Submandibular Glands: Located in the submandibular triangle beneath the investing fascia; consist of superficial and deep lobes.
• Digastric Muscles: Anterior bellies define the medial gland border.

Nerves to Avoid:

• Marginal Mandibular Nerve (CN VII): Superficial to gland capsule
• Lingual Nerve (V3): Deep and superior to the gland
• Hypoglossal Nerve (CN XII): Deep and posterior to the gland

Vessels:

• Facial artery (deep to gland)
• Facial vein (superficial)
• Central gland perforators (must be ligated)

III. Surgical Technique

• Positioning: Supine with neck extension.
• Incision: Submental, 3–4 cm horizontal crease under chin.

Dissection:

• Elevate submental flaps.
• Incise platysma in midline.
• Excise subplatysmal fat between digastrics.

Submandibular Gland Reduction:

• Open capsule.
• Perform intracapsular dissection to preserve nerves.
• Debulk superficial lobe; preserve deep lobe and duct.
• Ligate central vessels.

• Optional Digastric Reduction: Shave hypertrophic muscle.
• Platysmaplasty: Midline plication.
• Hemostasis & Closure: Drains, fibrin sealant, layered closure.

IV. Postoperative Care

• Overnight observation.
• Drain removal in 24–48 hours.
• Antibiotics until drains are out.
• Monitor for hematoma, marginal nerve weakness, or sialocele.
• Botox can be used for persistent sialocele.

V. Outcomes

• Excellent cervicomental angle and contour.
• No long-term impact on salivary function.
• High patient satisfaction with low complication rate.

VI. Avoiding Complications

• Hematoma: Secure vessel ligation, use of drains.
• Nerve injury: Stay intracapsular, gentle traction.
• Sialocele: Cauterize gland bed, use fibrin glue.
• Contour irregularities: Conservative fat removal.

VII. References

• O’Daniel TG. Neck contouring with submandibular gland excision: Techniques, outcomes, and safety. Aesthetic Surgery Journal. 2021.
• Mendelson BC, Wong CH. Submandibular gland reduction in aesthetic surgery of the neck. Plastic and Reconstructive Surgery. 2020.
• Wong CH, Mendelson BC. Anatomy of the mandibular marginal nerve and its relation to submandibular gland. PRS Global Open. 2018.
• Ellenbogen R, Karlin JV. Visual criteria for success in restoring the youthful neck. Plastic and Reconstructive Surgery. 1980.
• Ghazi AE, et al. Anatomic study of male vs female neck tissue composition. Facial Plastic Surgery. 2022. Shah AR. Deep neck contouring vs liposuction: Defining the ideal patient. Facial Plastic Surgery Clinics. 2019. Rohrich RJ, et al. Mastering the subplatysmal plane: Pearls in neck rejuvenation. PRS Journal. 2023.

For More Information, visit our educational resources at drgouldplasticsurgery.com/resources or contact us to schedule a professional training consultation. This content is provided for educational purposes and reflects the clinical experience and current literature as of 2025.

Deep Neck Contouring Surgical Manual: Submandibular Gland Excision & Deep Neck Fat Removal

Introduction

Deep neck contouring is an advanced neck rejuvenation technique that addresses structures deep to the platysma to achieve a sharper cervicomental angle and a defined jawline. Traditional necklifts primarily tighten skin and platysma, but fullness can persist if deeper structures (subplatysmal fat and submandibular glands) are enlarged or ptotic. By directly reducing these deep structures, surgeons can obtain exceptional neck contours beyond what superficial techniques accomplish. In the past, submandibular gland excision in cosmetic surgery was controversial due to concerns about nerve injury or dry mouth. However, recent series have demonstrated that, with proper technique, partial removal (“contouring”) of the submandibular glands and deep fat is safe and effective, with no long-term salivary dysfunction. This manual provides a detailed step-by-step guide to deep neck contouring focusing on subplatysmal fat removal and submandibular gland reduction, emphasizing anatomical landmarks, dissection technique, nerve and vessel preservation, and measures to maximize safety.

Preoperative Assessment & Indications

Careful patient selection and planning are crucial for deep neck contouring. Key considerations include:

• Neck Anatomy Evaluation – Assess the contribution of fat, platysmal banding, and gland prominence to neck fullness. Patients with a visible bulge in the lateral submandibular region (especially when the neck is at a right angle to the body) are likely to benefit from gland reduction. A useful guideline is to check if the gland visibly protrudes below a line from the mandibular border to the hyoid; a bulge indicates an obvious gland ptosis that will persist without reduction. In “fat necks,” palpation is needed since fat can mask a gland bulge that may emerge after fat removal.
• Indications for Submandibular Gland Contouring – Patients with persistent submandibular fullness despite weight loss or those seeking a sharper jaw-neck angle beyond what liposuction or platysmaplasty alone can achieve are candidates. Often these include older patients with gland ptosis or younger patients with genetically large glands. If a patient has had a prior necklift but still has residual “neck bulges” under the jaw, gland reduction can address what was previously overlooked.
• Salivary Gland Function – It is critical to ensure the patient has no history of xerostomia or major salivary gland disease. Those with pre-existing dry mouth or Sjögren’s, for example, are poor candidates. In practice, surgeons exclude patients with a tendency to dry mouth to avoid compounding any secretory insufficiency. Fortunately, removing or reducing one submandibular gland does not usually cause dry mouth because of functional redundancy (the parotids and remaining salivary tissue compensate). Indeed, large series have reported no cases of permanent xerostomia after partial submandibular gland resection.
• Patient Expectations & Consent – During consultation, discuss the scope of surgery – that this is a more involved procedure than a simple lipo or skin excision. Patients should understand the small risk of nerve injury or need for a drain. Emphasize that salivary function will be preserved and show evidence (e.g. studies and your experience) that there’s no significant long-term impact on saliva or digestion. Informed consent should cover potential complications like hematoma, marginal mandibular nerve weakness, or sialocele (saliva collection).
• Photography & Marking – Mark the submandibular triangles (bounded by the digastric muscles and mandible) preoperatively and note the areas of maximal gland fullness. Often, the outline of each submandibular gland can be palpated and marked with the patient upright. Mark the planned submental incision (typically a 3–4 cm transverse line in the natural crease just behind the chin). Also mark any platysmal band midlines if present (for platysmaplasty) and areas of fat excess (central submental vs. lateral). These markings guide intraoperative resection – for example, confirming which submandibular bulge is more prominent to ensure symmetric reduction.

Key Anatomy of the Deep Neck

A thorough understanding of neck anatomy is essential to safely navigate deep neck surgery. Important anatomical landmarks and structures include:

• Submental and Submandibular Triangles – The submental triangle lies between the anterior bellies of the digastric muscles (under the chin), whereas each submandibular triangle is bounded by the mandible (above), anterior digastric (medially), and posterior digastric (laterally). The submandibular gland resides chiefly in the submandibular triangle, with its deep lobe extending around the posterior edge of the mylohyoid muscle.
  
  
• Platysma and Deep Cervical Fascia – The platysma is a thin superficial muscle in the neck. Deep to platysma is the investing layer of deep cervical fascia, which splits around the submandibular gland to form its capsule. Notably, the marginal mandibular branch of the facial nerve (CN VII) runs in the plane between the platysma and the investing fascia (i.e. just superficial to the gland capsule) as it crosses the mandible. This means that during subplatysmal dissection, the marginal nerve will be located superficial to the plane of surgery and can be protected as long as dissection stays just outside the gland capsule.
  
  
• Subplatysmal (Deep Neck) Fat – There are two principal fat compartments in the neck – supraplatysmal fat (between skin and platysma) and subplatysmal fat (beneath platysma). Subplatysmal fat commonly accumulates in the interdigastric area (submental fat pad) between the anterior bellies of the digastric, and also lateral to the digastrics overlying the mid-portion of the submandibular gland. This deep fat pad contributes to the fullness under the chin and is usually approached by direct excision (as liposuction cannot reliably remove fat beneath the platysma). Caution: the volume of subplatysmal fat varies – overly aggressive removal can cause a hollow; thus a graded removal is performed to restore a smooth contour.
  
  
• Digastric Muscles – The right and left anterior bellies of the digastric run from the chin (digastric fossa of mandible) to the hyoid bone (where they meet the posterior bellies via an intermediate tendon). In a heavy neck, these muscles may be enlarged or bulky, appearing as a convex ridge beneath the subplatysmal fat. They define the medial boundary of each submandibular gland. After removing the overlying fat, the anterior digastrics become visible as strap-like muscles coursing from the midline back to the hyoid. Hypertrophied digastrics can themselves cause a “double chin” effect and sometimes are surgically thinned. Deep to the digastrics and mylohyoid lies the tongue musculature and the floor of mouth structures, including the submandibular duct and lingual nerve.
  
  
• Submandibular Gland – The submandibular gland has a superficial lobe and a smaller deep process that hooks around the posterior free edge of the mylohyoid muscle into the floor of mouth. The gland is surrounded by a fibrous capsule and is located just below the mandible. Its Wharton’s duct emerges from the deep lobe and runs forward above the mylohyoid to drain at the sublingual caruncle.
• Vascular Structures – The facial artery runs through the submandibular triangle and gives off the submental artery. The facial vein runs more superficial. Small venous branches should be cauterized.

Nerves to Preserve:

• Marginal Mandibular Nerve (CN VII)
• Lingual Nerve (V3)
• Hypoglossal Nerve (CN XII)
  
  

Surgical Technique: Step-by-Step Deep Neck Contouring

I. Anesthesia and Patient Positioning

This procedure is typically done under general anesthesia with endotracheal intubation. The patient is placed supine with the neck extended. Local anesthetic with epinephrine is infiltrated along the planned incision and areas of dissection.

II. Submental Incision & Platysma Exposure

Make a horizontal submental incision and dissect to identify the platysma. Elevate the skin flap and continue subplatysmal dissection laterally.

III. Subplatysmal Fat Excision

Excise deep fat conservatively to reveal underlying structures while maintaining smooth contour.

IV. Identification of Submandibular Gland & Capsule

Locate and incise the gland capsule and perform intracapsular dissection.

V. Gland Delivery and Partial Excision

Resect gland tissue in a controlled fashion, ensuring hemostasis and preservation of vital structures.

VI. Optional: Anterior Digastric Muscle Reduction

Resect portions of hypertrophic digastric muscle if needed to improve contour.

VII. Platysma and Neck Muscle Adjustment

Perform platysmaplasty and adjust soft tissue to refine contour.

VIII. Hemostasis and Closure

Ensure complete hemostasis, place drains, and close incision in layers.

Postoperative Care and Monitoring

Monitor airway, manage drains, control pain, and provide follow-up care to ensure safe recovery.

Outcomes and Benefits

Deep neck contouring yields significant aesthetic improvements with high patient satisfaction and durable results.

Critical Safety Considerations & Complications to Avoid

Careful surgical technique minimizes risks such as hematoma, nerve injury, and sialocele.

Conclusion

Deep neck contouring provides advanced neck rejuvenation by addressing deep structures while preserving function. With proper technique, it achieves refined, long-lasting results.