...Cysts can deteriorate the quality of human speech production, causing diplophonia, a condition where the vocal cords produce multiple tones at the same time, or dysphonia, an impaired quality of voice typically involving hoarseness or a breathy sound. Females are more likely than males to develop vocal fold cysts and the menstrual cycle may alter the size of the cyst. The cysts usually appear on one side of the vocal fold but may cause swelling on the opposite side due to irritation. Read full entry

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