Tumori dello spazio parafaringeo. Presentazione di un caso clinico di mioepitelioma a cellule chiare del lobo profondo della ghiandola parotide e revisione della letteratura.

The parapharyngeal space is a deep neck region and can be the site of a wide range of neoplasms, including primary benign or malignant tumors, metastatic tumors, neoplasms invading the parapharyngeal space from the adjacent regions and neoformations stemming from systemic processes. Tumors of the parapharyngeal space are, nevertheless, relatively rare and account for 0.5-0.8% of all head and neck tumors. Most are benign tumors originating in the deep lobe of the parotid gland and the minor salivary glands. The most frequent tumor is pleomorphic adenoma while myoepithelioma accounts for just 1% of all salivary gland tumors. The present case report involves a case of myoepithelioma of the deep parotid gland lobe, arising in the parapharyngeal space. Together with a review of the literature, considerations are presented on the clinical and radiological evaluation, differential diagnosis and treatment of these lesions.