Salivary gland tumours or neoplasms are tumours that form in the tissues of salivary glandsthe salivary glands are classified as major or minorthe major salivary glands consist of the parotid submandibular and sublingual glands the minor salivary glands consist of 800 1000 small mucus secreting glands located throughout the lining of the oral cavity. Warthins tumor is the second most common benign tumor of the parotid gland it is more common in older men it is more common in older men cancerous malignant tumors are rare in the salivary glands and usually occur between ages 50 to 60. A mucocele is a benign mucus containing cystic lesion of the minor salivary gland this type of lesion is most commonly referred to as mucocele the more common is a mucus extravasation cyst the other is a mucus retention cyst. Adenoid cystic carcinoma is the most common malignant tumor of minor salivary glands and of the trachea it is a slowly growing malignant transformation of a much more common benign cylindroma the 5 yr survival rate is 95 with the low grade type primarily affecting mucus cells and 50 with the high grade type primarily affecting . The mucous and salivary gland group of tumours has been defined1 as being made up partly of tumours of the large salivary glands of the mouth and partly of similar tumours which occur particularly within or in the neighbourhood of mucous membranes with serous sero mucous or mucous glands
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