Hemangiopericytoma of the parapharyngeal space: a diagnostic challenge.

Parapharyngeal space tumors are known for having a difficult approach, misleading diagnosis and for representing a treatment challenge. Hemangiopericytomas account for less than 1% of all vascular neoplasms and 3% of all soft tissue sarcomas. Only 14 cases have been reported in the worldwide literature in this location. We present a case of a 44-year-old male who was referred for evaluation. A CT scan and MRI showed a large parapharyngeal mass of a possible salivary gland origin. The patient underwent a lateral cervicotomy associated with a transparotid-transmandibular approach, obtaining a vimentin-positive immunostaining tumor defining the diagnosis. The accurate management and prognosis of this type of neoplasm are provided by the definite diagnosis obtained by a correct histopathologic assessment. A high clinical suspicion is essential.