Residency · Residency · Otolaryngology
Benign Vocal Fold Lesions: Nodules, Polyps, and Cysts
Overview
Benign vocal fold lesions are among the most common causes of dysphonia. Accurate differentiation between nodules, polyps, and cysts is essential because it determines whether voice therapy alone may suffice or surgical intervention is needed. Phonomicrosurgery for these lesions demands meticulous technique to preserve the superficial lamina propria (Reinke space) and optimize voice outcomes.
| Lesion | Laterality | Etiology | Voice Therapy Response | Surgery |
|---|---|---|---|---|
| Nodules | Bilateral, symmetric | Chronic phonotrauma | 50-80% improve (first-line) | Only if refractory |
| Polyps | Usually unilateral | Acute phonotrauma / hemorrhage | Rarely resolves polyp | Usually required |
| Cysts (epidermoid/retention) | Unilateral, submucosal | Ductal obstruction / congenital | Unlikely to resolve | Required (microflap) |
| Reinke edema | Bilateral, diffuse | Smoking, reflux, voice abuse | Limited | For significant dysphonia |
Vocal Fold Nodules
Pathophysiology
Bilateral, symmetric, callous-like thickening at the junction of the anterior and middle thirds of the membranous vocal fold (midpoint of the vibrating edge). Result of chronic phonotrauma: excessive voice use, yelling, singing with poor technique. Histology: thickened epithelium, edematous or fibrotic SLP, basement membrane zone thickening. Most common in women (20-50 years) and children.
Clinical Features
Gradual onset hoarseness, vocal fatigue, reduced range, Worse with voice use; may improve with rest. Stroboscopy: bilateral symmetric lesions; hourglass glottic closure pattern; mucosal wave present but may be reduced over lesions.
Management
Voice therapy is first-line treatment: behavioral modification, vocal hygiene, reduction of phonotrauma. Response rate to therapy: 50-80% improvement. Surgery indicated only for persistent nodules refractory to adequate voice therapy (minimum 6-8 weeks). Surgical technique: cold instrument excision with preservation of SLP; avoid aggressive resection.
Vocal Fold Polyps
Pathophysiology
Usually unilateral; result from acute or chronic phonotrauma or a single vocal hemorrhage. Hemorrhagic polyp: from rupture of a subepithelial vessel. Histology: edematous (myxoid), hyalinized, or hemorrhagic stroma within the SLP. Location: typically at the midportion of the membranous vocal fold; may be sessile or pedunculated.
Clinical Features
Acute or subacute onset of hoarseness. May have a history of a specific vocal event (screaming episode). Stroboscopy: unilateral mass with possible contralateral reactive lesion; asymmetric vibration; mucosal wave preserved surrounding the polyp but disrupted over it. Pedunculated polyps may cause intermittent dysphonia (positional).
Management
Voice therapy trial may improve symptoms but rarely resolves the polyp. Surgical excision is usually required: phonomicrosurgery with microflap technique. Small pedunculated polyps: cold instrument excision at the base. Hemorrhagic polyps: may benefit from a brief period of voice rest and anti-reflux treatment before surgery.
Vocal Fold Cysts
Types
Epidermoid (keratinous) cyst: lined by keratinizing squamous epithelium; contains keratin debris; may result from glandular duct obstruction or congenital rest. Mucus retention cyst: lined by glandular epithelium; contains mucus; from blocked minor salivary gland duct.
Clinical Features
Unilateral submucosal mass; may mimic a polyp on surface examination. Stroboscopy is critical: stiffness of the overlying mucosa with absent or markedly reduced mucosal wave distinguishes cyst from polyp. Contralateral reactive lesion common (nodule-like), Often presents as "nodules that fail voice therapy".
Management
Voice therapy alone is unlikely to resolve a cyst. Surgical excision with microflap approach: epithelial incision lateral to the lesion, dissect the cyst wall from the SLP, remove intact if possible. Incomplete excision risks recurrence. Intracordal cysts are technically challenging; rupture of the cyst wall during dissection is common.
Reinke Edema (Polypoid Corditis)
Pathophysiology
Bilateral diffuse edema of the SLP (Reinke space). Strongly associated with smoking; also gastroesophageal reflux, hypothyroidism, chronic voice abuse. Histology: myxoid degeneration of the SLP with thickened basement membrane.
Clinical Features
Low-pitched, husky voice; classic presentation in female smokers. Bilateral, fusiform, translucent swelling of the entire membranous vocal fold. Stroboscopy: exaggerated mucosal wave (sloshing); reduced frequency. May cause airway compromise in severe cases.
Management
Smoking cessation is essential (will recur without it), Address reflux and hypothyroidism if present, Voice therapy for concurrent phonotrauma. Surgery for persistent symptoms: microflap technique with suction aspiration of myxoid material from the SLP; preserve epithelium and avoid excessive tissue removal (risk of scar and high-pitched voice).
Vocal Fold Hemorrhage and Varices
Hemorrhage
Rupture of a submucosal vessel, usually during strenuous voice use. Acute dysphonia (often during a performance or shouting). Laryngoscopy: unilateral ecchymosis of the vocal fold. Management: strict voice rest for 1-2 weeks; stroboscopy after resolution to assess for underlying varix, polyp, or scar. Risk of permanent SLP damage if voice use continues during hemorrhage.
Varices (Ectasias)
Dilated submucosal vessel on the vocal fold surface, May be the source of hemorrhage, Identified on stroboscopy or with NBI. Treatment: office-based or OR laser photocoagulation (KTP or pulsed dye laser) for recurrent hemorrhage.
Sulcus Vocalis
Types
Type I (physiologic): superficial depression; usually asymptomatic. Type II (sulcus vergeture): loss of SLP with atrophic mucosa adherent to the vocal ligament. Type III (open cyst/sulcus pocket): invagination of epithelium into the SLP; may contain keratin.
Clinical Features
Breathy, weak voice; vocal fatigue. Stroboscopy: absent mucosal wave over the sulcus; bowing of the vocal fold. Often bilateral.
Management
Voice therapy for compensation. Surgical options limited and results unpredictable: Medialization injection or thyroplasty for glottic insufficiency. Mucosal slicing technique (releasing the adhesion). Fat injection into the SLP. Sulcus excision with or without SLP augmentation.
Phonomicrosurgery Principles
Preoperative
Document voice quality (GRBAS/CAPE-V, VHI, acoustic analysis). Videostroboscopy to define the lesion and plan approach. Voice therapy trial for nodules and select polyps before surgery. Counsel patient on realistic voice outcome expectations.
Technique
Suspension microlaryngoscopy under general anesthesia, Operating microscope or endoscope for magnification. Cold instruments (microflap knives, scissors, forceps) preferred over laser for most benign lesions. Microflap technique: epithelial incision on the superior surface lateral to the lesion; elevate a microflap; dissect the lesion from the underlying SLP/ligament; remove the lesion; replace the mucosal flap. Preserve the SLP at all costs: the SLP does not regenerate; loss leads to scar and permanent hoarseness. Avoid cautery on the vibrating edge of the vocal fold. CO2 laser: acceptable for papilloma, leukoplakia, selected vascular lesions; avoid for routine benign lesions.
Postoperative
Voice rest: 3-7 days of complete voice rest (controversial; some advocate early gentle phonation). Voice therapy: begin 1-2 weeks postoperatively to optimize voice recovery and prevent recurrence. Follow-up stroboscopy at 4-6 weeks.
<image>Endoscopic comparison of benign vocal fold lesions. Four panels during phonation. Panel A: Bilateral vocal fold nodules at the junction of the anterior and middle third with hourglass closure pattern. Panel B: Unilateral hemorrhagic polyp of the right vocal fold with a contralateral reactive lesion. Panel C: Left vocal fold epidermoid cyst showing a smooth, round submucosal mass with overlying vascular changes and stiff mucosa. Panel D: Bilateral Reinke edema with diffuse translucent polypoid swelling of both vocal folds. Each panel includes a stroboscopic still showing the mucosal wave status: preserved in nodules, asymmetric in polyp, absent over cyst, and exaggerated in Reinke edema.</image>
<image>Microflap phonomicrosurgery technique for vocal fold cyst removal. Step-by-step illustration showing: (1) Identification of the cyst on the medial surface of the vocal fold under microscopic magnification. (2) Lateral cordotomy incision on the superior surface using a sickle knife. (3) Elevation of the epithelial microflap to expose the cyst within the SLP. (4) Careful dissection of the cyst wall from the surrounding SLP using a ball-tip dissector. (5) Removal of the intact cyst. (6) Replacement of the epithelial flap over the preserved SLP. Cross-sectional insets show the relationship of the cyst to the five layers of the vocal fold at each surgical step.</image>
<image>Stroboscopic mucosal wave patterns in benign vocal fold lesions. Six sequential still frames from a single vibratory cycle for each condition. Row 1: Normal vocal folds showing symmetric mucosal wave with complete closure. Row 2: Nodules showing hourglass closure with mucosal wave present but reduced amplitude at the nodule site. Row 3: Polyp showing asymmetric vibration with larger amplitude on the normal side. Row 4: Cyst showing absent mucosal wave overlying the cyst with adynamic segment. Row 5: Reinke edema showing exaggerated, sloshing mucosal wave bilaterally. Row 6: Sulcus vocalis showing absent mucosal wave with bowing and incomplete closure.</image>
Clinical Pearls
Bilateral symmetric lesions at the midpoint of the membranous vocal fold are nodules until proven otherwise; voice therapy is first-line and curative in the majority. A "nodule" that fails adequate voice therapy should raise suspicion for an underlying cyst; stroboscopy showing absent mucosal wave over the lesion is the key differentiating finding. Preservation of the superficial lamina propria is the cardinal principle of phonomicrosurgery; the SLP does not regenerate, and its loss results in permanent vocal fold scar and dysphonia. Reinke edema will invariably recur without smoking cessation; surgery without addressing the underlying cause is futile. Vocal fold hemorrhage in a performer requires immediate strict voice rest; continued phonation during hemorrhage can cause permanent SLP damage and vocal fold scar. The microflap technique with cold instruments is the gold standard for most benign lesions; CO2 laser should be reserved for papilloma, dysplasia, and selected vascular lesions.
References
- Rosen CA, Gartner-Schmidt J, Hathaway B, et al. "A nomenclature paradigm for benign midmembranous vocal fold lesions." Otolaryngol Head Neck Surg. 2012;147(5):813-826.
- Zeitels SM, Hillman RE, Bunting GW, Vaughn T. "Reinke's edema: phonatory mechanisms and management strategies." Ann Otol Rhinol Laryngol. 1997;106(7 Pt 1):533-543.
- Bouchayer M, Cornut G, Witzig E, Loire R, Roch JB, Bastian RW. "Epidermoid cysts, sulci, and mucosal bridges of the true vocal cord: a report of 157 cases." Laryngoscope. 1985;95(9 Pt 1):1087-1094.
- Courey MS, Garrett CG, Ossoff RH. "Medial microflap for excision of benign vocal fold lesions." Laryngoscope. 1997;107(3):340-344.
