A glossectomy is surgery to remove part or all of the tongue. It is most commonly performed to treat tongue cancer, though it can also address precancerous lesions, benign tumors, obstructive sleep apnea, and a condition called macroglossia, where the tongue is abnormally large. The scope of the surgery varies widely, from shaving off a thin layer of surface tissue to removing the entire tongue, depending on how deep and how far a tumor has spread.
Types of Glossectomy
Surgeons classify glossectomies based on how much tongue tissue needs to come out. A widely used system breaks this into five types, each matched to a specific stage of disease.
- Mucosectomy: Only the surface layer of the tongue is removed. This is used for precancerous or very shallow suspicious lesions that haven’t penetrated deeper tissue.
- Partial glossectomy: A wedge or section of the tongue is removed. This applies to tumors that have grown into the muscle layer but remain less than 10 mm deep.
- Hemiglossectomy: Roughly half the tongue is removed. This is indicated when the tumor has invaded deeper muscles but is still confined to one side of the tongue.
- Subtotal or near-total glossectomy: Most of the tongue is removed. This becomes necessary when a tumor has crossed the midline into the opposite side or extended toward the base of the tongue.
- Total glossectomy: The entire tongue is removed. This is reserved for massive tumors that have infiltrated muscles on both sides and severely impaired tongue movement.
The decision about which type to perform hinges on imaging scans (MRI or CT) that reveal how deeply the tumor has invaded and which muscles are involved. Tumor size on the surface matters, but depth of invasion is equally important in modern staging. A tumor smaller than 2 cm that has grown more than 5 mm deep, for example, is staged differently than one the same size that stays shallow.
Why Glossectomy Is Performed
The most common reason is squamous cell carcinoma of the oral tongue, which is the dominant type of mouth cancer. Surgeons also perform glossectomies for incisional or excisional biopsies when a tongue lesion looks suspicious but hasn’t yet been diagnosed. Benign growths that cause functional problems, severe obstructive sleep apnea that hasn’t responded to other treatments, and macroglossia (sometimes seen in genetic conditions like Down syndrome or Beckwith-Wiedemann syndrome) are less common but recognized reasons for the procedure.
How the Surgery Works
For small, superficial procedures like a mucosectomy or limited partial glossectomy, the surgery may be relatively straightforward: the surgeon removes the affected tissue with a margin of healthy tissue around it, and the wound may be closed directly or left to heal on its own.
Larger resections create a significant gap in the mouth that needs to be filled with tissue from elsewhere in the body. This is called free-flap reconstruction. The surgeon transplants a patch of tissue, complete with its own blood supply, from a donor site and microsurgically connects its blood vessels to vessels in the neck. The two most commonly used donor sites are the forearm (radial forearm flap) and the outer thigh (anterolateral thigh flap). Other options include tissue from the abdomen or the back. Free-flap reconstruction of the tongue was first introduced in 1983 and has become the standard approach for rebuilding the tongue after major resections.
The goal of reconstruction is to create a “neo-tongue,” a mound of tissue shaped to make contact with the palate. That contact is what allows a person to form sounds during speech and move food toward the throat during swallowing.
Recovery and Hospital Stay
Recovery varies dramatically by the extent of surgery. After a partial glossectomy, many patients go home the same day. After more extensive surgeries requiring reconstruction, a hospital stay of seven to 10 days is typical.
During the first days in the hospital, reduced tongue sensation and limited movement are normal. A feeding tube is often placed to ensure adequate nutrition and hydration while the surgical site heals. Pain generally lasts a few weeks. Oral hygiene becomes especially important during this period because the moist surgical environment is prone to infection. Most patients start on a liquid or soft-food diet and gradually progress as healing allows.
Complications
A systematic review of total glossectomy outcomes found an overall complication rate of about 33%. Most of these complications were manageable. Salivary fistula, where saliva leaks through an abnormal opening in the surgical site, occurred in about 3% of cases. Aspiration pneumonia, caused by food or liquid entering the lungs, occurred at a similar rate of roughly 3%. Flap failure, where the transplanted tissue loses its blood supply and doesn’t survive, is another recognized risk, though careful microsurgical technique has made this less common over time.
Impact on Speech
The tongue is essential for shaping nearly every consonant and vowel in speech, so any glossectomy affects articulation to some degree. The impact scales with how much tongue is removed. After a small partial glossectomy, many people regain nearly normal speech. After a total glossectomy, the change is dramatic.
In one study of patients who underwent total glossectomy with reconstruction, single-word intelligibility dropped to about 47% after surgery, down from roughly 82% before. Sentence intelligibility fell to about 62%, down from 93%. Sentences are easier to understand than isolated words because listeners can use context clues to fill in gaps. These numbers highlight a real and significant change in daily communication, but they also show that meaningful speech remains possible even after losing the entire tongue.
Speech therapy is a core part of recovery. Programs are tailored to each patient and may include home exercises, one-on-one sessions, or group therapy. Patients who regularly attend speech and swallowing therapy sessions consistently show better functional outcomes than those who don’t.
Eating and Swallowing After Surgery
Swallowing is the other major function that changes after glossectomy. The tongue normally pushes food backward into the throat in a coordinated wave. Without part or all of that mechanism, moving food safely becomes harder, and the risk of food or liquid going down the airway increases.
Dietary modifications are a key strategy. The progression typically moves from thickened liquids to pureed foods to soft solids. Thin liquids, while seemingly easier to consume, actually cause more coughing and aspiration than thicker options because they move too fast for the compromised swallowing mechanism to control. Thickened liquids slow the transit enough to reduce that risk, though they can leave residue in the throat that needs to be managed with swallowing techniques.
Other non-surgical strategies include adjusting head posture during meals, taking smaller bites, eating more slowly, and sometimes using a dental prosthesis that lowers the roof of the mouth to help the reconstructed tongue make better contact. A speech and swallowing therapist works with each patient to find the combination of strategies that allows the safest, most comfortable eating possible. Some patients eventually return to a near-normal diet, while those who have had more extensive resections may rely on modified textures long-term.