Sulcus vocalis is a disease characterized by furrows in the mucosa of the vocal folds and which causes “hoarseness.” The symptoms of sulcus vocalis are caused by a disturbance in the mucosal waves on the vocal folds, by incomplete glottis closure with the “sulcus,” and a “bowing” change in the vocal cord. To treat the symptoms, we have to remove the “sulcus” and the “bowing,” but we do not yet have a technique to remove the “sulcus” completely or a method that can reset the mucous membrane to its normal state. A retrospective review of 105 patients with sulcus vocalis seen at the Department of Otolaryngology, University of Tokyo Hospital in the 10 years from 1992 to 2001 was carried out in order to gain the etiology, clinical aspects, treatments and results. The results were as follows.
1) There were 81 males and 24 females, and the male to female ratio was approximately 4:1. The age range was from 11 to 78 years, with a mean of 49.0 years.
2) The age of onset had two peaks: between 10 and 15 years and between 55 and 60 years. Regarding the average contraction period, the group of patients whose onset age was over 50 years was shorter than that of the other group.
3) The majority of the patients had a mild to severe degree of hoarseness with a breathy quality. The mean maximum phonation time at the first visit was 14.3 s for males and 12.6 s for females. The mean airflow rate with loud phonation was 412.8 ml/s for males and 274.9 ml/s for females. At high pitched phonation, it was 351.4 ml/s for males and 249.8 ml/s for females.
4) 28 patients of the total (27%) were treated by phonosurgery. The total cases of phonosurgeries were 63.23 patients had intra-cordal injection of collagen. The average no. of injections was 2.3 times per a patient. The average interval between injections was approximately 3 months.
5) The surgically treated patients showed improvements on the GRABS scale, especially in terms of “breathy” and “roughness.” The average MPT after treatment became 1 s longer, but this was not a significant improvement statistically.
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