Cystadenocarcinoma of salivary gland presenting as a cystic lesion in the mandible

Cystadenocarcinoma is a rare salivary neoplasm. It occurs in major and minor salivary glands and usually has a good prognosis. Mandibular involvement by salivary gland tumors at presentation is exceptionally rare. We present the first case, to our knowledge, of salivary gland cystadenocarcinoma appearing as a cystic lesion in the mandible.