How do Vocal Cord Cysts, Polyps, and Nodules Form?

There are MANY theories as to how vocal cord cysts, polyps, and nodules form. However, one theory that seems to make the most sense to me deals with how the vocal cord heals after a traumatic event (ie, screaming, yelling, coughing, etc).

With a cyst, the mucosal vocal cord lining breaks down and during the healing process a cyst develops due to entrapped cells meant for creating lining. A polyp, however, is in essence a blistering of the vocal cord lining. Vocal cord nodule for comparison's sake is just callous thickening of the vocal cord lining that occurs over time.

To use human skin as an analogy...

A vocal cord cyst is like a sebaceous cyst that commonly occurs under the skin of the face or neck (a pimple, but no opening to the surface).

A vocal cord polyp is like a blister that forms on the hand if you shovel dirt too much.

A vocal cord nodule is like a callous that forms after prolonged repetitive skin trauma (like callous on the hands after shoveling dirt for years).

Read more about vocal cord cysts, polyps, and nodules!

New Webpage on Vocal Cord Cysts and Vocal Cord Polyps

We have uploaded a new webpage describing what vocal cord cysts and vocal cord polyps are as well as how they are treated.

Vocal cord cysts are masses below the vocal cord lining whereas vocal cord polyps are masses involving the vocal cord lining.

Read more here!

Respiratory Spasmodic Dysphonia

Respiratory spasmodic dysphonia is one of the most rare subtypes of a class of laryngeal dystonia collectively known as spasmodic dysphonia. It is also known more accurately as laryngeal adductor breathing dystonia or respiratory spasmodic dystonia or respiratory laryngeal dystonia.

Introduction

Spasmodic dysphonia is a type of dystonia in which there are involuntary muscle spasms or contractions of the muscles involved in voice production. This disorder is similar to the involuntary eyelid twitches of blepharospasm. Spasmodic dysphonia should not be, but is often confused with muscle tension dysphonia or tremor. There are 2 main types of spasmodic dysphonia: ABductor and ADductor. Other much more rare types include mixed and respiratory.

ADductor dysphonia is when the vocal cords comes together suddenly while talking resulting in voice stops and effortful speech. Often, the voice chokes off. Counting from 80 to 89 is harder than counting from 60 to 69. Stressful situations often exacerbate the condition. ABductor dysphonia is when the vocal cords suddenly moves apart while talking resulting in loss of voice (breathy). These patients find counting from 60 to 69 harder than counting from 80 to 89. ABductor dysphonia is not as common as ADductor dysphonia.

Respiratory Spasmodic Dysphonia

Respiratory spasmodic dysphonia is when the vocal cords come together suddenly when inhaling. So the voice actually sounds quite normal... until the patient takes a breath in. During such inhalation, one can hear an audible choking sound.

A brief word about nomenclature. "Dysphonia" means hoarseness. As such, the term respiratory spasmodic dysphonia is not accurate. Rather, "dystonia" should be used instead which is defined as an abnormal muscle contraction.

In the video clip shown above, in the first half of the video, listen to the audio of a patient suffering from respiratory spasmodic dystonia talking. The latter half is a video of the patient's voicebox while vocalizing. Note that the vocal cords intermittently do not move apart when she is taking a breath in. Normally with breathing, the vocal cords should move apart to allow air to pass between the vocal cords.

Treatment

Treatment is the same as for ADductor spasmodic dysphonia. Botox is injected into the vocal cords which reduces the spasms when she takes a breath in.

Watch a video of botox being injected.

Click here to read more about spasmodic dysphonia.

Dr. Chang performs botox injections for this disorder every Friday afternoon.