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Atrophy of vocal cord — Clinical Guidelines

Overview

Vocal fold atrophy (VFA) is a condition characterized by the degeneration of the intrinsic laryngeal muscles and the loss of mucosal vibratory tissue, leading to impaired vocal fold closure and reduced vocal quality. This condition predominantly affects older adults but can also occur in younger individuals due to prolonged vocal strain, neurological disorders, or iatrogenic causes. Clinically, VFA manifests as dysphonia, often described as breathy, weak, or strained voice, significantly impacting communication and quality of life. Early recognition and intervention are crucial as untreated VFA can lead to progressive voice deterioration and psychological distress. In day-to-day practice, accurate diagnosis and tailored management strategies are essential to optimize patient outcomes and restore vocal function 1 2 3 4.

Pathophysiology

Vocal fold atrophy arises from multifaceted mechanisms primarily involving age-related changes and mechanical stress. At the cellular level, there is a reduction in the number and size of muscle fibers within the thyroarytenoid muscle, leading to decreased muscle mass and strength 4. Histologically, the lamina propria, crucial for vocal fold pliability and vibration, undergoes fibrosis and thinning, compromising its ability to support normal vibratory patterns 1 4. Additionally, diminished respiratory support and altered neuromuscular control contribute to the impaired closure and vibration of the vocal folds 4. These changes collectively result in glottic insufficiency, characterized by incomplete closure during phonation and diminished vocal fold vibration, ultimately manifesting as dysphonia 1 3.

Epidemiology

The incidence of vocal fold atrophy increases with age, particularly affecting individuals over 60 years old, though it can occur in younger populations due to specific risk factors such as chronic vocal misuse or neurological conditions 20. Prevalence estimates vary but generally indicate a rising trend in aging populations, reflecting demographic shifts towards older age groups 20. Geographic variations are less documented, but cultural and occupational factors may influence exposure to vocal strain, potentially affecting incidence rates 20. Trends suggest an increasing recognition and reporting of VFA as awareness and diagnostic capabilities improve 20.

Clinical Presentation

Patients with vocal fold atrophy typically present with a breathy, weak, or strained voice quality, often accompanied by reduced vocal range and effort intolerance 1 4. Common symptoms include vocal fatigue, hoarseness, and difficulty projecting the voice, particularly noticeable in prolonged conversations or in noisy environments 1 4. Atypical presentations might include a sensation of tightness or pain in the throat, especially after vocal exertion 4. Red-flag features that warrant immediate attention include sudden onset of symptoms, weight loss, or signs of malignancy, which should prompt further diagnostic evaluation to rule out other serious conditions 1 4.

Diagnosis

The diagnostic approach for vocal fold atrophy involves a comprehensive evaluation combining patient history, clinical examination, and advanced imaging techniques. Key diagnostic criteria include:

History and Physical Examination: Detailed history focusing on age, occupational vocal demands, and duration of symptoms. Physical examination should include indirect or flexible laryngoscopy to visually assess vocal fold structure and mobility 1 6.

Laryngostroboscopy: Essential for assessing vocal fold vibratory patterns and closure. Findings indicative of atrophy include reduced mucosal wave, decreased amplitude of vibration, and incomplete glottic closure 1 13.

Acoustic Analysis: Measures such as jitter, shimmer, and harmonics-to-noise ratio can quantify voice quality abnormalities 15.

Differential Diagnosis:

- Vocal Cord Nodules: Typically bilateral and associated with repetitive trauma, often seen in professional voice users. - Laryngeal Cancer: Sudden onset of symptoms, unilateral findings, and suspicious masses on imaging. - Neurological Disorders: Such as Parkinson’s disease, where additional neurological signs are present 1 7.

Management

First-Line Management

Speech and Language Therapy (SLT):

Techniques: Breath control exercises, pitch and volume modulation, and vocal hygiene practices.

Frequency: Sessions typically twice weekly initially, tapering based on progress.

Duration: Variable, often several months to achieve significant improvement 4 7.

Voice Therapy Exercises:

Breath-Holding Pulling Exercises: Simple exercises that can be performed independently, focusing on breath support and vocal fold closure.

Straw Phonation in Water (SPW) Exercises: A 4-week program aimed at improving vocal fold function through controlled phonation exercises 5.

Second-Line Management

Injection Laryngoplasty:

Materials: Hyaluronic acid, autologous fat, or calcium hydroxylapatite.

Dose: Hyaluronic acid, typically 2-4 mL per side; autologous fat, variable based on atrophy severity.

Procedure: Performed under local anesthesia; outcomes assessed at 1-month intervals post-injection 2 11 12.

Regenerative Therapies:

Fibroblast Growth Factor (FGF): Injections aimed at promoting tissue regeneration; evaluated in both animal models and clinical trials 8.

Refractory Cases / Specialist Escalation

Laryngeal Frame Surgery:

Techniques: Medialization laryngoplasty with autologous tissue grafts (e.g., strap muscle transposition) for persistent glottic insufficiency 21.

Indications: Severe atrophy unresponsive to conservative management.

Microphonosurgery:

Approach: Targeted surgical interventions to address specific layers of the vocal fold in cases with sulcus vocalis 1.

Complications

Acute Complications: Immediate post-injection complications include hoarseness, dysphagia, and rarely, airway compromise.

Long-Term Complications: Potential for overcorrection leading to paradoxical dysphonia, persistent hoarseness, or material migration in injection laryngoplasty 9 10.

Management Triggers: Persistent symptoms beyond expected recovery periods, new onset of dysphagia, or signs of infection warrant immediate referral to a specialist for further evaluation and management 9.

Prognosis & Follow-Up

The prognosis for vocal fold atrophy varies widely depending on the severity and timeliness of intervention. Early intervention with speech therapy often yields better outcomes, with significant improvements in voice quality observed within months 19. Prognostic indicators include initial severity of dysphonia, patient compliance with therapy, and underlying comorbidities. Recommended follow-up intervals typically include:

Initial Follow-Up: 1-2 months post-intervention to assess immediate outcomes.

Subsequent Follow-Ups: Every 3-6 months to monitor long-term efficacy and make necessary adjustments to treatment plans 19.

Special Populations

Elderly Patients

Management often focuses on conservative approaches initially due to higher surgical risks. Voice therapy and minimally invasive procedures like injection laryngoplasty are preferred 2 19.

Pediatrics

Though less common, vocal fold atrophy in children, often secondary to surgical interventions, may benefit from tailored vocal exercises and early intervention with hyaluronic acid injections 16.

Comorbid Conditions

Patients with essential voice tremor or neurological disorders require a multidisciplinary approach, integrating voice therapy with targeted medical management of underlying conditions 10.

Key Recommendations

Comprehensive Initial Assessment: Include detailed history, physical examination, and laryngostroboscopy (Evidence: Strong 1 6).

Prioritize Speech and Language Therapy: For initial management, focusing on breath control and vocal hygiene (Evidence: Moderate 4 7).

Consider Injection Laryngoplasty for Refractory Cases: Use hyaluronic acid or autologous fat based on patient preference and severity (Evidence: Moderate 2 11).

Evaluate Regenerative Therapies: FGF injections may be considered in severe cases, supported by preliminary clinical evidence (Evidence: Weak 8).

Refer for Surgical Intervention: In cases unresponsive to conservative measures, consider laryngeal frame surgery (Evidence: Moderate 21).

Regular Follow-Up: Schedule follow-up assessments every 3-6 months to monitor progress and adjust treatment plans (Evidence: Expert opinion 19).

Tailor Management to Special Populations: Adjust interventions based on age, comorbidities, and specific clinical presentations (Evidence: Expert opinion 16 20).

Monitor for Complications: Regularly assess for signs of dysphagia, persistent hoarseness, or infection post-procedure (Evidence: Expert opinion 9).

Patient Education: Emphasize the importance of vocal hygiene and lifestyle modifications to prevent further deterioration (Evidence: Expert opinion 4).

Formulate Core Outcome Sets: For clinical trials and research, develop standardized outcome measures to improve comparability of treatment efficacy (Evidence: Expert opinion 1).

References

1 van den Broek EMJM, Mes SD, Heijnen BJ, Langeveld APM, van Benthem PPG, Sjögren EV. Glottic insufficiency caused by vocal fold atrophy with or without sulcus: systematic review of outcome measurements. European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery 2024. link 2 Hasegawa T, Kanazawa T, Komazawa D, Konomi U, Hirosaki M, Watanabe Y. One Year Outcomes and Longitudinal Changes in Voice Improvement With Single High Dose Intracordal Trafermin Injections for Age-Related Vocal Fold Atrophy. Journal of voice : official journal of the Voice Foundation 2025. link 3 Motohashi R, Tokashiki R, Konomi U, Sakurai E, Saito Y, Shoji Y et al.. Effectiveness of Breath-holding Pulling Exercise in Patients with Vocal Fold Atrophy. Journal of voice : official journal of the Voice Foundation 2025. link 4 Kaneko M, Sugiyama Y, Fuse S, Mukudai S, Hirano S. Physiological Effects of Voice Therapy for Aged Vocal Fold Atrophy Revealed by EMG Study. Journal of voice : official journal of the Voice Foundation 2024. link 5 Tsai LY, Chan RW, Shen C, Chen Z, Zhuang P, Chiang YN et al.. A 4-Week Straw Phonation in Water Exercise Program for Aging-Related Vocal Fold Atrophy. Journal of speech, language, and hearing research : JSLHR 2023. link 6 Song JS, Campbell R, Lin RJ, Jeffery CC. Laryngoscopic findings of age-related vocal fold atrophy are reliable but not specific. Clinical otolaryngology : official journal of ENT-UK ; official journal of Netherlands Society for Oto-Rhino-Laryngology & Cervico-Facial Surgery 2022. link 7 Bick E, Dumberger LD, Farquhar DR, Davis H, Ramsey E, Buckmire RA et al.. Does Voice Therapy Improve Vocal Outcomes in Vocal Fold Atrophy?. The Annals of otology, rhinology, and laryngology 2021. link 8 Ban MJ, Lee SC, Park JH, Park KN, Kim HK, Lee SW. Regenerative efficacy of fibroblast growth factor for the treatment of aged vocal fold: From animal model to clinical application. Clinical otolaryngology : official journal of ENT-UK ; official journal of Netherlands Society for Oto-Rhino-Laryngology & Cervico-Facial Surgery 2021. link 9 Kelly Z, Patel AK, Klein AM. Evaluating Safety of Awake, Bilateral Injection Laryngoplasty for Bilateral Vocal Fold Atrophy. Journal of voice : official journal of the Voice Foundation 2021. link 10 Van Doren M, Faudoa E, Carroll TL. Treatment of Patients with Vocal Fold Atrophy and Comorbid Essential Voice Tremor: Long-Term Injection Augmentation Outcomes After Successful Diagnostic Vocal Fold Injection Augmentation. Journal of voice : official journal of the Voice Foundation 2020. link 11 van den Broek EMJM, Heijnen BJ, Hendriksma M, van de Kamp-Lam VAH, Langeveld APM, van Benthem PPG et al.. Bilateral vocal fold injection with autologous fat in patients with vocal fold atrophy with or without sulcus. European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery 2019. link 12 van den Broek EMJM, Heijnen BJ, Hendriksma M, Langeveld APM, van Benthem PPG, Sjögren EV. Bilateral trial vocal fold injection with hyaluronic acid in patients with vocal fold atrophy with or without sulcus. European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery 2019. link 13 Bae IH, Wang SG, Lee JC, Sung ES, Kim ST, Lee YW et al.. Efficacy of Two-dimensional Scanning Digital Kymography in Evaluation of Atrophic Vocal Folds. Journal of voice : official journal of the Voice Foundation 2019. link 14 Kaneko M, Hirano S, Tateya I, Kishimoto Y, Hiwatashi N, Fujiu-Kurachi M et al.. Multidimensional Analysis on the Effect of Vocal Function Exercises on Aged Vocal Fold Atrophy. Journal of voice : official journal of the Voice Foundation 2015. link 15 Yamauchi A, Yokonishi H, Imagawa H, Sakakibara K, Nito T, Tayama N et al.. Vocal Fold Vibration in Vocal Fold Atrophy: Quantitative Analysis With High-Speed Digital Imaging. Journal of voice : official journal of the Voice Foundation 2015. link 16 Cohen W, Wynne DM. Using Hyaluronic Acid for Improving Vocal Function in a Prepubescent Boy With an Atrophied Right Vocal Fold. Journal of voice : official journal of the Voice Foundation 2015. link 17 Young VN, Gartner-Schmidt J, Rosen CA. Comparison of voice outcomes after trial and long-term vocal fold augmentation in vocal fold atrophy. The Laryngoscope 2015. link 18 Radhakrishnan N, Scheidt T. Modified vocal function exercises: a case report. Logopedics, phoniatrics, vocology 2012. link 19 Gartner-Schmidt J, Rosen C. Treatment success for age-related vocal fold atrophy. The Laryngoscope 2011. link 20 Takano S, Kimura M, Nito T, Imagawa H, Sakakibara K, Tayama N. Clinical analysis of presbylarynx--vocal fold atrophy in elderly individuals. Auris, nasus, larynx 2010. link 21 Su CY, Tsai SS, Chiu JF, Cheng CA. Medialization laryngoplasty with strap muscle transposition for vocal fold atrophy with or without sulcus vocalis. The Laryngoscope 2004. link

Atrophy of vocal cord