Profesionales médicos

Sept. 10, 2026

Sialendoscopy is a minimally invasive, gland-preserving technique used by Mayo Clinic otolaryngologists to diagnose and treat salivary gland conditions. It particularly benefits patients with recurrent sialadenitis, most often due to obstructive disease, and those with unexplained glandular swelling when imaging is inconclusive. In select patients, this approach may be preferred over salivary gland removal to avoid unnecessary morbidity while preserving salivary gland function.

"Sialendoscopy has come into play especially for salivary gland conditions that otherwise would have been borderline indicated for surgical removal," says Oluwafunmilola T. Okuyemi, M.D., an otolaryngologist specializing in surgical oncology and microvascular reconstruction at Mayo Clinic in Jacksonville, Florida. "It opens up another dimension to the management of salivary gland conditions."

Indications for diagnostic or therapeutic sialendoscopy

Otolaryngologists use sialendoscopy to evaluate and manage obstructive salivary gland disorders. The procedure also aids diagnosis and treatment in patients with chronic or recurrent sialadenitis without a clearly identifiable obstructive cause.

Common etiologies include:

• Sialolithiasis, which is the presence of stones within the salivary glands or salivary ducts.
• Ductal stenosis, which is narrowing of the ducts.
• Radiation-induced salivary gland dysfunction following external beam radiation or radioactive iodine therapy.
• Autoimmune sialadenitis, commonly associated with Sjögren's syndrome or Mikulicz syndrome.

Preprocedural imaging guides intervention selection by identifying stones on noncontrast imaging and excluding tumors on contrast-enhanced CT or ultrasound. These findings help determine whether patients are candidates for sialendoscopy alone or may require a combined or open surgical approach.

Presentation of salivary gland disorders

Patients considered for sialendoscopy typically present with recurrent swelling of the parotid, submandibular or, less commonly, sublingual glands. Symptoms often include pain and swelling that worsen with eating.

"Once you find the right candidate for the procedure, there is about a 90% success rate of treating their condition without gland removal," Dr. Okuyemi says.

Technical considerations and contraindications for sialendoscopy

Stone size, location and mobility influence the feasibility of sialendoscopic management in patients with sialolithiasis. Surgeons can most easily remove smaller, distal and mobile stones endoscopically, while larger, proximally located or impacted stones may require a combined endoscopic and open approach.

Additional factors that may limit or delay sialendoscopy include:

• Active infection, which requires treatment before sialendoscopy.
• Active ductal inflammation, which typically warrants deferring the procedure until symptoms improve.
• Scarring or stenosis at the duct opening, which limits endoscopic access.
• Trismus that restricts the mouth opening to 3 centimeters or less.

Sialendoscopy techniques for common clinical indications

Based on the underlying pathology and ductal findings, otolaryngologists employ several techniques during sialendoscopy. Advances in endoscopic instrumentation, including submillimeter-caliber endoscopes, have expanded the therapeutic scope of the procedure and improved ductal visualization and access.

Sialendoscopy for sialolithiasis

Mayo Clinic otolaryngologists most commonly use sialendoscopy to manage salivary stones. They may remove small stones — ideally less than 5 millimeters — using baskets or microforceps. Larger stones, closer to 7 millimeters, may require laser lithotripsy to fragment the stone before extraction. Surgeons may repeat the procedure in cases of recurrent stones, most often resulting from dehydration or inflammation from an autoimmune condition.

Sialendoscopy for ductal stenosis

Recurrent gland swelling without an identifiable stone on imaging often suggests ductal stenosis. Sialendoscopy enables direct visualization of the ductal system to identify areas of narrowing.

Treatment options include ductal dilation, intraductal steroid instillation via injection catheters or temporary stent placement to maintain ductal patency. Surgeons also may use a microdrill to open dense or fibrotic strictures.

Advantages of sialendoscopy versus sialoadenectomy

Compared with salivary gland excision, sialendoscopy can effectively treat a range of salivary gland disorders while preserving gland function and reducing morbidity. Advantages of this minimally invasive approach include:

• No external scarring.
• Reduced risk of nerve injury, particularly to the marginal mandibular and facial nerves involved in controlling facial movement.
• Shorter recovery, with most patients resuming daily activities within 2 to 3 days.

"While the operative time for sialendoscopy can sometimes take as long as or longer than gland removal depending on the condition being managed, it does save the patient a lot in terms of risk and recovery," Dr. Okuyemi says.

Risks and complications of sialendoscopy

Sialendoscopy most commonly causes temporary gland swelling due to manipulation of the duct and surrounding tissues. While complications rarely occur, the procedure requires careful technique to avoid:

• Abrasion or bleeding around the duct opening.
• Ductal wall injury.
• Nerve injury.
• Scarring of the duct opening or ductal walls.

Opportunities for advancing sialendoscopy

Sialendoscopy remains a specialized procedure, with a small patient population limiting opportunities for prospective research. Multicenter collaboration will be key to refining patient selection, optimizing use of the technique and better characterizing outcomes.

"Instrumentation and technology could also become more fine-tuned with future consideration for automation or a robotic system for this procedure specifically," Dr. Okuyemi says. "But it would still need surgeon oversight given the tenuous anatomy of the ductal openings."

Currently, Mayo Clinic researchers are studying salivary gland regeneration after radiation therapy and have developed the world's first salivary gland tissue-organoid biobank. These advances may help address underlying gland dysfunction and complement gland-preserving interventions such as sialendoscopy, reflecting a broader shift toward preserving and restoring salivary gland function.

For more information

Refer a patient to Mayo Clinic.