In Japan, Type Ⅳ thyroplasty has predominantly been performed as a voice-feminization surgery for transgender women, while anterior glottoplasty has not been widely practiced. In this study, we examined changes in voice before and after anterior glottoplasty at our institution. The results were then compared with those of type Ⅳ thyroplasty performed at the same institution, and the characteristics of each procedure were discussed. Both surgical techniques yielded a postoperative voice frequency of >200 Hz, which is considered a feminine voice. However, each technique has its own advantages and disadvantages, and it was concluded that the choice of procedure should be tailored to individual patients.
