Hemangiopericytoma/solitary fibrous tumor of the buccal mucosa: A case report

We report a case of HPC/SFT located in the buccal mucosa. A 50-year-old woman presented with a 5-year history of a painless mass in the left buccal mucosa. Clinical findings showed the lesion was a well-defined tumor between the cheek skin and buccal mucosa with two feeding arteries, indicating hemangioma. The tumor was completely resected under general anesthesia. Histopathologically, immunostaining for STAT6 revealed results consistent with HPC/SFT, and no findings suggestive of malignancy, such as tumor size greater than 5 cm and high proliferative activity as shown by mitotic index and Ki-67 index. No other distinct primary lesion or distant metastasis was detected on whole-body computed tomography. Dealing with the lesion as a precancerous or potentially malignant tumor, follow-up was performed for 5 years after surgery, but neither recurrence nor metastasis was observed. As recurrence or metastasis may be delayed by many years, follow-up needs to be continued long-term according to risk factors of malignant behavior such as tumor size, cell characteristics and proliferative activity.
Source: Journal of Oral and Maxillofacial Surgery, Medicine, and Pathology - Category: ENT & OMF Source Type: research