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SALIVARY GLAND

Salivary glands are glands found in and around the mouth throat .They secrete saliva into the mouth through tubes called salivary ducts. There are 3 major salivary glands – the parotid, sublingual glands Besides these, there are 600-1000 tiny glands called minor salivary glands located in the lips, inner Cheek area (buccal mucosa), and linings of the mouth and throat. Salivary glands produce saliva that moistens the mouth , acts as a lubricant for speech , helps in swallowing, initiates digestion , has antibacterial and protects teeth from decay.


SALIVARY GLAND DISEASES

Disorders of the salivary glands include
Hyperplasia or swelling of the salivary glands:

Rarely, the minor salivary glands may be swollen. They are seen as mild, painless masses usually on the roof of the mouth and soft plate. A biopsy is needed to be done to rule out other diseases. Once diagnosed, these swellings may subside on their own.


Salivary stones or calculi in the gland causing obstruction to the saliva flow :

Sialoliths or salivary gland stones may be formed in the salivary glands or ducts. These cause obstruction to the flow of saliva. Patients complain of periodic pianfulswelling, typically when eating. The salivary glands swell then gradually subside after eating. If not treated early, infections or abscesses may occur. Sometimes the salivary ducts may have small constructions , which decrease salivary flow , leading to infection (sialadenitis) and obstructive symptoms.


Salivary gland infections :

Infections in the salivary gland may be viral, most commonly mumps, or bacterial. Most bacterial infections occur due to obstruction of salivary flow. Secondary infections of salivary glands from near by lymph nodes may also occur. The affected gland get swollen and painful accompanied with fever and difficulty in opening the mouth. Treatment includes antibiotic therapy and surgical drainage of the infection in case of abscess.


Trauma to the duct causing its rupture :

Sometimes due to injury , the salivary gland duct may rupture leading to spillage of mucin into the surrounding soft tissues. This leads to the formation of mucocele or small dome – shaped swellings. These are very commonly seen on the lower lip or cheek. When they occur on the floor of the mouth, they are called ranula(retention cyst).


Under – functioning of the salivary gland causing dry mouth or xerostomia:

Dry mouth may be due to various causes like improper development or functioning of the salivary glands, excess water loss from the body , as a side effect of some medications or radiation therapy to the head and neck , diseases like Sjogren’s syndrome, Diabetes or dry mouth may also occur due to local f/actors like smoking and mouth breathing. To cure the mouth dryness, first the underlying cause must be treated. Salivary substitutes may be used, or sugarless candy or gum can help keep the mouth moist. Good oral hygiene should be maintained to prevent mouth infections.


Salivary gland tumors:

Benign or malignant tumors of the salivary glands may occur as growth or enlargements in the roof or floor of the mouth, cheek or lip. One or more glands may be involved. Any pain or loss of function of the affected region should be immediately.


Autoimmune diseases like Sjogren’s syndrome:

In some autoimmune diseases like HIV and Sjogren’s syndrome, the salivary glands may be inflamed. Along with dry mouth (xerostomia) there may also be painful and burning sensation and dryness of the eyes. Secretory glands of the nose and throat may also be involved. Treatment is mostly supportive. Tear and saliva substitutes may be used to prevent dryness. Increased risk of tooth decay and fungal infections should be managed with preventive care.


Tests and investigations of salivary gland diseases

We advocate the latest advanced imaging techniques to diagnose and treat salivary gland diseases. The various imaging techniques include Sialography (specialized dye is injected in the salivary gland and an X ray of the gland is taken ), computed Tomography (CT scans) Ultrasonography, Magnetic Resonance Imaging (MRI) , radioisotope scanning.
If an obstruction of the major salivary glands (salivary gland stone) is suspected, dental X rays show where the calcified stones are located.Sometimes , a biopsy is needed to be done of the salivary gland swelling.


Treatment of salivary gland diseases

Treatment of salivary gland diseases includes medical and surgical modalities. Type of treatment depends upon the nature of the disease. If it is due to underlying medical conditions, then that must be treated first.
Some salivary gland lesions require to be removed surgically. Salivary gland stones or Sialoliths have to be surgically excised. If the stones are located with I the duct, surgical approach through the mouth may be planned. If the stones are within the gland and if there are severe changes in the duct structure, then the gland may be surgically removed extra orally.
In case of abscess, surgical drainage of the pus with antibiotic therapy may be required. If an abnormal growth or mass has developed with in the salivary gland, removal of the mass may be recommended. During surgery, great care must be taken to avoid damage to the facial nerve. This is an extremely vital nerve of the face that is responsible for movements of the facial muscles including the mouth and eye.