The salivary glands, located in the mouth, throat, and neck, are responsible for producing saliva, a vital fluid that performs multiple functions. Saliva not only keeps the mouth moist, facilitating speech and swallowing, but it also contains enzymes that initiate the digestion process and antibodies that protect against infections.
Salivary gland tumors originate when the cells of these glands undergo genetic mutations that alter their growth and division. These abnormal cells can multiply uncontrollably, forming a mass or tumor. Although most salivary gland tumors are benign (noncancerous) and slow-growing, some can be malignant (cancerous) and have the ability to invade surrounding tissues and spread to other parts of the body (metastasis), affecting the health and quality of life of patients.
Symptoms of salivary gland tumors
Early detection is key to successful treatment. The symptoms of salivary gland tumors can vary depending on the location and size of the tumor. Some of the most common symptoms include:
Presence of a lump or swelling in the mouth, jaw, neck, or ear.
Persistent pain in the affected area.
Difficulty swallowing or talking.
Numbness or weakness in the face.
Changes in taste.
It is important to note that these symptoms can also be caused by other non-cancerous conditions, such as infections or inflammation of the salivary glands. However, if you experience any of these symptoms, it’s important to see a doctor for an accurate diagnosis.
Classification of salivary gland tumors
Once a salivary gland tumor is detected, it is crucial to classify it properly to determine the best treatment approach. Salivary gland tumors are classified according to several factors, including:
Cell type: tumors can originate from different types of salivary gland cells, such as epithelial cells, myoepithelial cells, or acinar cells. The most common cell types include:
Epithelial cells: these are the cells that line the ducts of the salivary glands. Tumors that originate in these cells are called adenomas (if they are benign) or carcinomas (if they are malignant).
Myoepithelial cells: they are specialized cells that help to contract the salivary ducts and secrete saliva. Tumors that originate in these cells are called myoepitheliomas (if they are benign) or myoepithelial carcinomas (if they are malignant).
Acinar cells: these are the cells that produce saliva. Tumors that originate in these cells are called acinar tumors if they are benign or acinar carcinomas if they are malignant.
Grade: the grade applies only to malignant (cancerous) tumors and is based on the appearance of the tumor cells under a microscope. The grade indicates how quickly cancer cells grow and spread. Low-grade tumors tend to grow slowly and have a better prognosis than high-grade tumors.
Stage: it applies only to malignant (cancerous) tumors and is based on the size of the tumor and whether it has spread to nearby lymph nodes or to other parts of the body (metastasis). The stage of the tumor is an important factor in determining the prognosis and treatment.
In addition to these factors, salivary gland tumors can also be classified according to their location (parotid gland, submandibular gland, sublingual gland, or minor salivary glands) and according to specific molecular characteristics (presence of certain genetic mutations). pecíficas (presencia de ciertas mutaciones genéticas).
Causes and risk factors of salivary gland tumors
Despite advances in research, the exact causes of salivary gland tumors are not always known. However, various risk factors have been identified that can increase the risk of developing these tumors, such as:
Age: the risk of developing salivary gland tumors increases with age.
Exposure to radiation: especially during childhood, the risk of developing salivary gland tumors can increase.
Smoking: smoking can increase the risk of developing certain types of salivary gland tumors.
Family history: having a family history of salivary gland tumors may increase the risk of developing the disease.
Certain genetic syndromes: some inherited genetic syndromes, such as Li-Fraumeni syndrome and Cowden syndrome, can increase the risk of developing salivary gland tumors.
If left untreated, salivary gland tumors can lead to various complications that affect the health and quality of life of patients. Some of the most common complications include:
Metastasis: cancer cells can spread through the lymphatic or blood system to other parts of the body, forming secondary tumors (metastases) in distant organs such as the lungs, bones, or liver.
Facial paralysis: if the tumor invades or compresses the facial nerve, it can cause paralysis or weakness of the facial muscles.
Difficulty swallowing or breathing: large tumors can obstruct the airways or esophagus, causing difficulty breathing or swallowing.
Severe pain: malignant tumors can cause severe and persistent pain, especially if they invade nerves or bones.
Horner syndrome: if the tumor affects the nerves of the sympathetic nervous system in the neck, it can cause Horner syndrome, which is characterized by drooping of the eyelid, constriction of the pupil, and decreased sweating on one side of the face.
If you experience any of the symptoms mentioned above, it is important to seek medical attention immediately for an accurate diagnosis and appropriate treatment.
Diagnosis of salivary gland tumors
The diagnostic process for salivary gland tumors is essential for determining the nature of the tumor and planning the most appropriate treatment. At HM Hospitales, we have a team of specialists and advanced technology to provide an accurate and early diagnosis. The diagnostic process generally includes:
Medical history and physical examination: the doctor will perform a complete physical examination of the mouth, throat, and neck to detect any abnormalities. They will also ask about your medical history, risk factors, and symptoms.
Imaging tests: they are essential for visualizing the tumor and determining its size, location, and extent. Magnetic resonance imaging (MRI) provides detailed images of soft tissues, allowing for a better assessment of the tumor and its relationship to surrounding structures. At HM Hospitales, we offer mpMRI services with state-of-the-art technology for accurate diagnosis. Computed tomography (CT) uses X-rays to create cross-sectional images of the body. It is useful for assessing the extent of the tumor to nearby lymph nodes or other parts of the body. Ultrasound uses sound waves to create images of soft tissues. It can be used to guide tumor biopsy.
Biopsy: it is the only definitive method to confirm the diagnosis of a salivary gland tumor. During a biopsy, a sample of tissue is removed from the tumor and examined under a microscope. There are different types of biopsies, including fine-needle aspiration (FNA), where a thin needle is used to extract cells from the tumor. An incisional biopsy (a small portion of the tumor is removed) or an excisional biopsy (the entire tumor is removed) can also be performed.
Treatment of salivary gland tumors
The goal of salivary gland tumor treatment is to remove the tumor completely and prevent its recurrence. At HM Hospitales, we offer a wide range of treatment options, tailored to the individual needs of each patient. Treatment options may include:
Surgery: it is the most common treatment for salivary gland tumors. The goal of the surgery is to remove the entire tumor, if possible. The type of surgery depends on the size, location, and type of the tumor. Some of the most common surgeries include parotidectomy (removal of the parotid gland), submandibulectomy (removal of the submandibular gland), and neck dissection (removal of the lymph nodes in the neck). At HM Hospitales, we have surgeons who specialize in endocrine surgery.
Radiotherapy: it uses high-energy radiation to destroy cancer cells. It may be used after surgery to destroy any remaining cancer cells or as the primary treatment if surgery is not an option.
Chemotherapy: chemotherapy uses medications to destroy cancer cells. It may be used to treat tumors that have spread to other parts of the body.
Targeted therapy: it uses medications that specifically target cancer cells. It can be used to treat certain types of salivary gland tumors that have specific genetic mutations.
A multidisciplinary approach involving head and neck surgeons, radiation oncologists, medical oncologists, and other specialists is essential for comprehensive and personalized treatment.
Remember that this article is for informational purposes only and does not replace professional medical advice. If you suspect that you have a salivary gland tumor, consult a specialist to obtain an accurate diagnosis and a treatment plan tailored to your needs. diagnóstico preciso y un plan de tratamiento adecuado a tus necesidades.
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