Extensive local invasive epi-myoepithelial carcinoma of the parotid gland

Purpose: Epi-myoepithelial carcinomas (EMC) of the salivary glands are rare, low grade malignant neoplasms with high propensity for recurrence. Local invasion into muscles and nerves has been noted at presentation, but extensive invasion even to the auditory canal and foramen jugulare has not been previously described. Herein, the case of a 62-year old male patient with a deep parotid region mass extending to the auditory canal is presented. The histology from the auditory canal showed a clear cell tumor, as only actin and S100 positivity was observed, without any epithelial differentiation. Proper diagnosis could be made after resection. EMC are known as low grade malignancies, but this case describes another feature of them. They can be extensively invasive and aggressive