Salivary gland cancer is a rare disease that affects the organs producing saliva in the mouth and throat. Treatment options depend on the cancer stage, tumor location, and individual patient characteristics, with surgery being the most common approach, often combined with radiation therapy or other methods. Medical research continues to explore new therapies to improve outcomes for people diagnosed with this uncommon type of cancer.

How Treatment Goals Are Set for Salivary Gland Cancer

When doctors treat salivary gland cancer, their main goals center on removing the cancerous tissue, preventing the cancer from coming back, and maintaining quality of life. Because this cancer is rare, affecting only about one in 100,000 people, treatment decisions must be highly personalized^[1]. The approach varies significantly based on where the tumor is located within the salivary glands, how large it has grown, and whether it has spread to nearby lymph nodes or distant organs.

The treatment strategy also considers the specific type of cells involved. For example, mucoepidermoid carcinoma and adenoid cystic carcinoma together account for about half of all malignant salivary gland tumors, and each may respond differently to treatment^[1]. Doctors work with multidisciplinary teams that include surgeons, radiation specialists, medical oncologists, pathologists, speech therapists, dieticians, and nurses to create comprehensive treatment plans tailored to each person’s situation^[11].

Treatment success depends on catching the cancer early. Surgery alone can cure some salivary gland cancers, particularly those detected when they are small and contained within the gland. For more advanced cancers or those with certain aggressive features, combining surgery with radiation therapy or other treatments provides better outcomes. Importantly, standard treatments approved by medical societies exist alongside ongoing clinical research exploring innovative therapies that may offer new hope.

Standard Treatment Approaches

Surgery as Primary Treatment

Surgery represents the cornerstone of salivary gland cancer treatment. The type of operation depends on several factors, including the tumor’s size, its exact location within the salivary gland, and whether there is concern about spread to nearby lymph nodes^[11]. Most salivary gland tumors begin in the parotid glands, which are the largest salivary glands located in front of and just below each ear^[7].

When removing a tumor from the parotid gland, surgeons must work carefully around the facial nerve, which controls movement of facial muscles. If the nerve is only bruised during surgery, facial weakness or stiffness is usually temporary. However, if the nerve must be removed because the cancer has grown into it, surgeons may reconstruct it using nerve grafts from other parts of the body to help restore facial function over time^[21].

During surgery, the doctor examines the area around the tumor and may remove some lymph nodes near it. This procedure, called a selective neck dissection, helps determine if cancer has spread and removes any remaining cancer cells, reducing the risk of recurrence^[11]. If cancer has already spread to lymph nodes in the neck, the surgeon may need to remove all nodes on one or both sides of the neck in a procedure called a modified radical neck dissection.

Radiation Therapy After Surgery

Radiation therapy uses high-energy rays to destroy cancer cells. Doctors commonly recommend radiation therapy after surgery to eliminate any cancer cells that might have been left behind, which significantly reduces the risk of the cancer returning^[11]. This approach is particularly important for cancers that have grown into surrounding tissues, have aggressive cellular features, or have spread to lymph nodes.

In some cases, radiation therapy serves as the main treatment when surgery is not possible. This might happen if the tumor’s position makes it extremely difficult to remove, if the patient has other health conditions that make a lengthy anesthesia risky, or if the cancer is too advanced to be completely removed surgically^[11].

Radiation therapy for salivary gland cancer can cause temporary side effects. Most people experience a dry mouth during treatment because radiation can damage the salivary glands and reduce their ability to produce normal amounts of saliva. The radiation therapy team takes measures to protect the salivary glands during treatment to minimize this risk. For most patients, dry mouth improves after radiation therapy finishes, although it can take several months or even years. In some cases, it may be a permanent side effect^[19].

Having a dry mouth for a long time can lead to dental problems, so regular dental checkups become especially important after radiation treatment. Speech and swallowing may also be temporarily affected due to tissue swelling in the mouth and throat, but speech and swallowing therapy can help preserve function during treatment and restore it afterward^[21].

When Chemotherapy Is Used

Chemotherapy involves using anti-cancer drugs to disrupt and kill cancer cells throughout the body. Unlike surgery and radiation, which work locally, chemotherapy travels through the bloodstream to reach cancer cells wherever they may be. However, chemotherapy does not work as well for salivary gland cancer as it does for many other types of cancer^[11].

Because of its limited effectiveness, chemotherapy is not a common treatment for salivary gland cancer. Doctors may consider it for treating advanced cancers that have spread to other parts of the body, such as the lungs, bones, or liver. It may also be used if the cancer has come back after surgery and radiation therapy, or as part of a clinical trial testing new drug combinations^[11].

The decision to use chemotherapy requires careful consideration of potential benefits versus side effects. Standard chemotherapy drugs can cause fatigue, nausea, hair loss, increased infection risk, and other effects that vary depending on the specific drugs used. Doctors discuss these possibilities openly with patients to help them make informed decisions about their care.

Treatment in Clinical Trials

Why Clinical Trials Matter for Rare Cancers

Clinical trials represent hope for better treatments. Because salivary gland cancer is rare, much remains to be learned about the best ways to treat it. Clinical trials test new drugs, innovative treatment combinations, and novel approaches that may prove more effective than current standard treatments. These studies follow strict scientific protocols and are conducted in phases to ensure patient safety while gathering critical information^[1].

Phase I trials focus primarily on safety, testing new treatments in small groups of people to determine safe dosing and identify side effects. Phase II trials examine whether the treatment works against the cancer, looking at effectiveness in larger groups. Phase III trials compare the new treatment directly with standard treatments to see if it offers advantages. Participation in clinical trials is always voluntary, and patients can discuss with their doctors whether a trial might be appropriate for their situation.

Targeted Therapies Being Tested

Targeted cancer drugs work differently from traditional chemotherapy. Instead of attacking all rapidly dividing cells, targeted therapies focus on specific molecules or pathways that cancer cells use to grow and spread. Some clinical trials are exploring targeted drugs specifically for advanced salivary gland cancer^[11].

One notable example involves a drug called Vorinostat, which was tested at specialized cancer centers in a Phase II clinical trial specifically designed for patients with adenoid cystic carcinoma, a common subtype of salivary gland cancer. Vorinostat belongs to a class of drugs that affect how genes are expressed in cancer cells. In this trial, the drug stopped cancer from growing and spreading in some patients. One patient remained on the treatment for five years and continues to have no evidence of cancer progression years after stopping the medication^[23].

This success story illustrates how clinical trials can lead to life-changing outcomes for patients with rare cancers. The patient who participated in the Vorinostat trial had cancer that had spread to the lungs and liver, and doctors told her that no other surgeries were appropriate. The clinical trial became her chance at controlling the disease, and it worked.

Innovative Approaches Under Investigation

Researchers are exploring multiple innovative treatment strategies for salivary gland cancer. These include new types of targeted therapies, immunotherapy approaches that help the immune system recognize and attack cancer cells, and combinations of treatments that may work better together than alone.

Some clinical trials specifically recruit patients whose cancer has not responded to standard treatments or has come back after initial therapy. Others test treatments for newly diagnosed patients, comparing innovative approaches with established ones. Clinical trials take place at specialized cancer centers across the United States, Europe, and other regions. Eligibility depends on factors such as the cancer stage, previous treatments received, overall health status, and the specific characteristics of the tumor^[1].

Doctors at major cancer centers stay informed about available clinical trials and can help patients determine if participating in a trial might be beneficial. Some patients need to travel to reach trial locations, but the potential for accessing cutting-edge treatments often makes this worthwhile.

Most Common Treatment Methods

• Surgery
  • Removal of the affected salivary gland and surrounding tumor tissue
  • Selective neck dissection to remove nearby lymph nodes
  • Modified radical neck dissection if cancer has spread to neck lymph nodes
  • Nerve reconstruction using grafts if facial nerve must be removed
• Radiation Therapy
  • High-energy rays directed at the tumor area after surgery to eliminate remaining cancer cells
  • Main treatment when surgery is not possible due to tumor location or patient health
  • Measures taken to protect remaining salivary glands during treatment
• Chemotherapy
  • Used for advanced cancers that have spread to other body parts
  • Applied when cancer returns after surgery and radiation
  • Sometimes included in clinical trial protocols testing new drug combinations
• Targeted Therapy
  • Vorinostat tested in Phase II trials for adenoid cystic carcinoma
  • Drugs that focus on specific molecular pathways cancer cells use
  • Available primarily through clinical trial participation
• Supportive Care
  • Speech and swallowing therapy to maintain or restore function
  • Physical therapy for facial weakness after nerve damage
  • Dental care management for patients experiencing dry mouth
  • Reconstructive surgery to address appearance changes

Living with Treatment Side Effects and Recovery

Treatment for salivary gland cancer can cause various side effects, some temporary and others potentially lasting longer. Understanding these effects helps patients prepare and cope. Dry mouth remains one of the most common long-term effects, particularly after radiation therapy. When the mouth does not produce enough saliva, eating, speaking, and swallowing can become uncomfortable. Artificial saliva products, frequent sips of water, and sugar-free gum or candy can provide relief^[19].

Some people develop a condition called Frey syndrome after surgery to remove a parotid gland. This happens when nerves cut during surgery reconnect to sweat glands in the skin while healing. The result is flushing or sweating on one side of the face when eating. Most people find this manageable, though some experience more severe symptoms they find embarrassing^[19].

Body image concerns affect many people treated for salivary gland cancer. Surgery may leave scars, radiation can cause skin color changes, and facial appearance may change if muscles or nerves are affected. Some changes are temporary, while others last longer. Reconstructive surgery may help some people, and counseling or support groups can provide emotional support^[19].

Follow-up Care and Monitoring

After completing treatment, regular follow-up appointments are essential. Doctors typically see patients frequently during the first year, perhaps every month, to monitor for any signs that cancer might be returning. The frequency of visits gradually decreases over time, moving to every two months during the second year, every three months in the third year, and then every six months to a year in subsequent years^[21].

During these appointments, doctors perform physical examinations and may order imaging tests such as CT scans or MRI scans to ensure the cancer has not returned. Blood tests and other assessments help monitor overall health and detect any treatment-related complications early. Speech and swallowing evaluations continue as needed to address any ongoing difficulties.

Staying connected with the healthcare team throughout recovery provides peace of mind and ensures that any problems are caught and addressed quickly. Many cancer centers offer survivorship programs that provide ongoing support for people who have completed active treatment.