<prompt> Which of the following increases the risk of salivary gland tumors?Radiotherapy to head and neckExposure to silica dustEarly menarche and nulliparityAll of the above  <response>: ETIOLOGY OF SALIVERY GLAND TUMORS - Radiotherapy to head and neck for mucoepidermoid carcinoma - EBV infection for lymphoepithelial carcinoma - Exposure to silica, dust, nitrosamines - Increased risk in females with early menarche and nulliparity - Trisomy 5 in primary mucoepidermoid carcinoma of minor salivary glands. - Polysomy of 3 and 17 especially in adenoid cystic carcinoma. 