臨床頸部に発生した悪性線維性組織球腫例

概要

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We report here in on a case of malignant fibrous histiocytoma (MFH) of the left postauricular region. A 17-year-old male was referred to our hospital with swelling of the left neck. CT scan and MRI showed a 2 cm mass lesion in the deep neck, and PET showed abnormal accumulation in the cervical lymph nodes and distant organs. Based on these findings, the tumor was considered as benign and was resected under general anesthesia. A histological examination showed that the tumor consisted of growing spindle cells with large irregular nuclei. Immunohistochemical staining with vimentin and α-SMA, showed that the tumor cells were positive. Finally the tumor was diagnosed as an MFH. Since the tumor was considered to be residual, we performed radical neck dissection as salvage surgery. To date, no local recurrence nor distant metastasis has been observed.