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Type III Thyroplasty for Patients With High-Pitched Voice Disorders: A Systematic Review and Meta-analysis.
Bruno Dalla Vecchia Vendramini1, Lucas Marinho Siqueira Campos2, Bruno Teixeira de Moraes2
1Federal University of São João del Rei, São João del Rei, Minas Gerais, Brazil.
Summary
Type III thyroplasty effectively reduces vocal pitch in men with high-pitched voice disorders. This surgical intervention, also known as relaxation thyroplasty, offers a viable solution for both cisgender and transgender individuals experiencing voice pitch issues.
Area of Science:
- Otolaryngology
- Phonosurgery
- Voice Science
Background:
- High-pitched voice disorders significantly impact social and professional lives for cisgender and transgender men.
- Effective treatment options are crucial for improving quality of life.
Purpose of the Study:
- To conduct a meta-analysis evaluating the efficacy of type III thyroplasty (relaxation thyroplasty) for high-pitched voice disorders.
- To compare outcomes across different patient populations and surgical techniques.
Main Methods:
- Systematic literature review adhering to PRISMA guidelines.
- Inclusion of studies on type III thyroplasty for high-pitched voice disorders.
- Primary outcome: change in fundamental frequency; subgroup analyses: cisgender vs. transgender, primary vs. secondary causes, unilateral vs. bilateral resection.
Main Results:
- Nine studies with 69 patients were analyzed (all Level 4 evidence).
- Significant reduction in fundamental frequency post-surgery (mean difference: -75.9 Hz).
- Cisgender men and unilateral resection groups showed greater pitch reduction.
Conclusions:
- Type III thyroplasty is an effective surgical treatment for lowering vocal pitch.
- The procedure is suitable for cisgender and transgender men with primary or secondary high-pitched voice disorders.
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