Mucus Retention Cyst
A mucus retention cyst forms when one of the mucus glands just below the vocal cord’s free margin becomes plugged. Mucus glands in this location secrete mucus in order to bathe and lubricate the vocal cords, but if a gland becomes obstructed, then the mucus it produces gets trapped and accumulates, leading to a mucus retention cyst. They typically occurs without any correlation to vocal overuse, in contrast to epidermoid cysts as well as nodules and polyps.
A mucus retention cyst can cause hoarseness, because it interferes with the normal vibrations of the vocal cords and the accuracy of their match with each other (see the videos below). The cyst is most often unilateral—that is, occurring on one cord but not the other. It appears as a bulge or deformation of the vocal cord’s free margin, and sometimes undersurface, and it may be yellowish in color.
The cyst may be surgically removed, by creating a small incision on the vocal cord and then dissecting the cyst from the cord. Photos of the surgical process can be found below. Also, the two videos below show how removing this kind of cyst can improve the voice.
Removal of Mucus Retention Cyst
Mucus-Retention Cyst—not Polyp—Before and After Removal
Mucus Retention Cyst: Before and After
Watch this video to see images and hear audio of a mucus retention cyst’s effect on the vocal cords, followed by the surgical removal and the post-surgical results.
Mucus Retention Cyst II: Before and After
Another example of a mucus retention cyst, with images and audio before, during, and after the cyst’s surgical removal. This video highlights a bit more of the vocal capability battery.