Definition
A vocal cord cyst (also termed a vocal fold cyst) is a benign, fluid‑filled sac that develops within the lamina propria or on the surface of the true vocal folds (vocal cords). The cyst can be congenital or acquired and may interfere with the vibration of the vocal folds, leading to voice disturbance.
Anatomical Context
The vocal folds are paired, mucosal folds located in the larynx that produce sound through rapid, periodic vibration. A cyst may arise in any layer of the vocal fold (epithelial, superficial lamina propria, or deep lamina propria) and is usually covered by a thin epithelial membrane.
Etiology
| Category | Typical Causes |
|---|---|
| Congenital | Developmental inclusion of epithelial tissue during embryogenesis. |
| Acquired | Repeated phonotrauma (e.g., excessive speaking, singing), inflammation, irritation from gastroesophageal reflux, minor trauma (e.g., intubation), or iatrogenic factors (e.g., surgical manipulation). |
Epidemiology
Vocal cord cysts are relatively uncommon compared to other laryngeal lesions such as nodules or polyps. They are more frequently diagnosed in professional voice users (singers, teachers, actors) but can occur in the general population. Precise prevalence data are limited.
Clinical Presentation
- Hoarseness or breathy voice
- Reduced vocal range and stamina
- Vocal fatigue
- Sensation of a lump or obstruction in the throat (occasionally)
Symptoms often develop gradually and may be subtle initially.
Diagnostic Evaluation
- Laryngoscopy: Indirect or flexible fiberoptic laryngoscopy allows visualization of a smooth, well‑circumscribed submucosal mass on the vocal fold.
- Stroboscopy: Provides dynamic assessment of vocal fold vibration, revealing restricted mucosal wave over the cystic region.
- Imaging (rarely required): High‑resolution CT or MRI may be employed if there is suspicion of deeper or atypical lesions.
- Histopathology (when surgically removed): Confirms cyst type (e.g., epidermoid, mucus‑filled) and excludes malignancy.
Management
| Approach | Indications / Details |
|---|---|
| Observation | Asymptomatic or minimally symptomatic cysts; periodic monitoring with laryngoscopy. |
| Voice Therapy | Adjunctive to surgical treatment or for mild cases; aims to reduce phonotrauma and optimize vocal technique. |
| Surgical Excision | Preferred for symptomatic cysts; techniques include microlaryngoscopic excision with cold steel instruments or laser (CO₂). The goal is complete removal while preserving the overlying epithelium to maintain vocal fold pliability. |
| Post‑operative Voice Rehabilitation | Important to restore optimal phonatory function and prevent scar formation. |
Prognosis
When completely excised and followed by appropriate voice therapy, most patients experience marked improvement or resolution of voice symptoms. Recurrence can occur if cyst remnants remain or if ongoing phonotrauma persists.
Complications
- Scar tissue formation leading to vocal fold stiffness
- Persistent dysphonia despite treatment
- Rare malignant transformation (not typical for benign cysts)
Research and Guidelines
Clinical practice guidelines for benign laryngeal lesions (e.g., from the American Academy of Otolaryngology–Head and Neck Surgery) recommend a stepwise approach: initial voice assessment, visualization via stroboscopy, conservative voice therapy when appropriate, and surgical removal for persistent or severe cases. Ongoing research investigates optimal surgical techniques to minimize scarring and maximize voice outcomes.
