Nodules, Polyps, and Cysts

Nodules, Polyps, and Cysts - Intro & Etiology

• Nodules, polyps, and cysts are common benign lesions of the vocal folds, typically affecting voice quality.
• Primary etiology: Chronic or acute voice abuse/misuse (phonotrauma), leading to localized inflammation and tissue changes.
• Relevant vocal fold anatomy:
  • Epithelium (outermost protective layer)
  • Superficial Lamina Propria (SLP) / Reinke's space (loose, pliable layer critical for vibration)
  • Vocal ligament (intermediate and deep lamina propria; provides structural support)
• Common presenting symptom: Hoarseness (dysphonia).

⭐ Reinke's space (Superficial Lamina Propria) is the primary site for the development of many benign vocal fold lesions, such as polyps and Reinke's edema, due to its susceptibility to vibratory trauma.

Nodules, Polyps, and Cysts - Bilateral Bumps

• Definition: Chronic inflammatory response from repetitive vocal fold trauma.

• Etiology: Chronic voice overuse/misuse (e.g., singers, teachers). 📌 Nodules = Nuisance for Noisy people, Bilateral.

• Location: Bilateral & symmetric; junction of anterior 1/3 and middle 1/3 of membranous vocal folds.

• Appearance: Small, whitish, callous-like lesions.

• Histology: Epithelial hyperplasia, basement membrane thickening, submucosal edema and/or fibrosis.

• Symptoms: Breathy voice, vocal fatigue, hoarseness; typically worse with prolonged voice use.

• Management:

  • Mainstay: Voice therapy.
  • Surgery (microlaryngoscopy) for refractory cases.

⭐ Vocal nodules are often called 'singer's nodes' or 'teacher's nodes'./n

Nodules, Polyps, and Cysts - Unilateral Swellings

• Vocal Fold Polyps: Benign, often unilateral lesions.

  • Etiology: Acute vocal trauma (e.g., shouting) or chronic irritation; can be a single event.

  • Location: Typically mid-membranous vocal fold, often in Reinke's space.

  • Appearance: Sessile or pedunculated; larger than nodules; variable color (gelatinous, hemorrhagic, fibrous/hyaline).

  • Symptoms: Hoarseness (often main symptom), breathiness, diplophonia (if pedunculated).

  • Management: Voice therapy; microlaryngosurgery often needed, especially for larger/hemorrhagic polyps.

  • 📌 Mnemonic: Polyp = Protrusion, often Unilateral.

⭐ Hemorrhagic polyps can result from a single episode of acute vocal trauma.

• Vocal Fold Cysts: Submucosal, typically unilateral, fluid-filled (mucous retention) or keratin-filled (epidermoid) sacs within lamina propria. Cause hoarseness; treatment is surgical excision (microflap).

Nodules, Polyps, and Cysts - Submucosal Secrets

• Definition: Epithelial-lined sac within the lamina propria.
• Etiology:
  • Mucous retention cysts: blocked gland duct.
  • Epidermoid/Keratin cysts: congenital or acquired (trauma/phonotrauma).
• Location: Intracordal, submucosal; can be anywhere along vocal fold. Usually unilateral.
• Appearance: Smooth, rounded, yellowish-white; distinct from surrounding tissue.
• Symptoms: Significant dysphonia, diplophonia, vocal fatigue. Stroboscopy: stiffness/absence of mucosal wave.
• Management:
  • Primary: Microlaryngosurgery for complete excision.
  • Voice therapy: Pre-operative and post-operative.

⭐ Vocal cysts typically do not resolve with voice therapy alone and often require surgical excision.

Nodules, Polyps, and Cysts - Spot the Lesion

Key Diagnostics: History, voice assessment, laryngoscopy. Videostroboscopy is crucial for differentiating lesions and assessing mucosal wave.

⭐ Videostroboscopy is indispensable for assessing vocal fold vibratory characteristics and differentiating benign lesions.

High‑Yield Points - ⚡ Biggest Takeaways

• Vocal nodules: Bilateral, symmetric, at mid-membranous vocal folds from chronic voice abuse; voice therapy is primary.
• Vocal polyps: Usually unilateral, in Reinke's space; can follow acute vocal trauma; surgery often needed.
• Vocal cysts: Unilateral, submucosal; do not resolve with voice therapy; microsurgery is mainstay.
• Hoarseness is the cardinal symptom for all three conditions.
• Stroboscopy is key for diagnosis and differentiating these benign lesions.