A microlaryngoscopy is a procedure that lets a surgeon examine and operate on your vocal cords using a microscope for magnification. It’s performed under general anesthesia, typically as an outpatient surgery, and is used both to diagnose problems like growths or suspicious lesions and to treat them in the same session.
How It Works
Once you’re under general anesthesia, the surgeon places a rigid metal tube called a laryngoscope through your mouth and down to your larynx (voice box). This tube is wide enough to fit one or two surgical instruments inside without blocking the view. The laryngoscope is then “suspended,” meaning it’s held in place by a support attached to the operating table, freeing up both of the surgeon’s hands.
An operating microscope is positioned above the laryngoscope, giving the surgeon a magnified, well-lit view of your vocal folds. This magnification is what separates the procedure from a standard direct laryngoscopy. Where a regular laryngoscopy gives the surgeon a direct line of sight, the microscope in a microlaryngoscopy lets them see fine details of the vocal fold surface, identify subtle changes in tissue, and work with much greater precision.
From there, the surgeon can simply examine the tissue, take a biopsy for lab analysis, or remove growths using small scissors, graspers, forceps, or a laser. CO2 lasers are commonly used to vaporize lesions or abnormal tissue with minimal damage to surrounding structures. Specialized instruments designed for this procedure include modified forceps with built-in suction channels to clear smoke during laser use and to keep the surgical field visible.
Conditions It Diagnoses and Treats
Microlaryngoscopy covers a wide range of vocal cord and airway problems. On the diagnostic side, it’s considered the gold standard for evaluating suspected head and neck cancers. Direct visualization with biopsy during the procedure provides a tissue diagnosis, lets the surgeon see how far a tumor extends, and gives an opportunity to perform a more extensive biopsy if something looks uncertain.
The procedure is also the primary approach for benign vocal fold lesions that haven’t improved with voice therapy. These include:
- Vocal cord polyps, fluid-filled swellings that typically form on one cord
- Vocal cord nodules, callous-like growths from chronic voice overuse
- Cysts, enclosed sacs of fluid or mucus beneath the vocal fold surface
- Papillomas, wart-like growths caused by a virus
- Subglottic or tracheal stenosis, narrowing of the airway below the vocal cords
In children, microlaryngoscopy combined with bronchoscopy is a key tool for evaluating stridor (noisy breathing), treating conditions like laryngomalacia (floppy tissue above the vocal cords), and removing foreign bodies from the airway.
The primary surgical goal with benign lesions is to remove the growth that’s interfering with vocal fold vibration while preserving as much healthy, flexible tissue as possible. This balance is what makes the microscope so valuable: it lets the surgeon distinguish abnormal tissue from normal tissue at a level of detail that wouldn’t be possible with the naked eye.
What to Expect Before Surgery
Because the procedure requires general anesthesia, you’ll need to fast beforehand, typically nothing to eat or drink after midnight the night before. Your surgical team will review your medications in advance and let you know if you need to stop any of them, particularly blood thinners, in the days leading up to surgery. You’ll also have a pre-operative assessment to check that you’re safe for anesthesia, which may include blood work and a review of your medical history.
If you have dental crowns, caps, or loose teeth, mention them to your anesthesiologist. The rigid laryngoscope passes through your mouth and presses against the upper teeth, which creates a small risk of dental injury. Across all surgeries requiring general anesthesia, dental damage occurs in roughly 1 in 600 cases. Wearing a dental guard during the procedure can reduce this risk.
Recovery and Voice Rest
Most people go home the same day. A sore throat is common and typically lasts a few days. You may also notice minor swelling or a temporary change in your voice, especially if tissue was removed or biopsied.
Voice rest is the most important part of recovery. The most common recommendation is seven days of rest, which usually includes a period of complete silence (no talking, whispering, or throat clearing) followed by a gradual return to speaking. Your surgeon will give you specific instructions based on what was done during the procedure. Whispering is not a gentle alternative to talking. It actually puts more strain on healing vocal folds than soft speech does.
Beyond voice rest, you can expect to avoid heavy lifting, strenuous exercise, and anything that causes you to bear down or strain for roughly a week. Some people experience mild nausea from the anesthesia, which typically resolves within a few hours. If a biopsy was taken, results usually come back within one to two weeks, and your surgeon will schedule a follow-up to discuss them.
Risks and Complications
Microlaryngoscopy is a low-risk procedure, but no surgery is without potential complications. The most common issue is minor bleeding at the surgical site, which occurs in roughly 24% of cases and usually resolves on its own. Temporary tongue numbness can happen from the pressure of the laryngoscope, and it typically fades within days to weeks.
The more serious concern, though uncommon, is scarring of the vocal folds. If too much tissue is removed or the deeper layers of the vocal cord are disrupted, scar tissue can form and permanently affect voice quality. This is why surgeons take a conservative approach, removing only what’s necessary and preserving the layered structure of the vocal fold. For the same reason, some people with extensive lesions may need more than one procedure, spaced out to allow healing between sessions.
Chipped or broken teeth from the laryngoscope, as noted above, are possible but infrequent. Rarely, there can be a reaction to general anesthesia or a temporary change in taste.