Solitary fibrous tumor arising in the sphenoethmoidal recess: A case report and review of the literature

Surgical treatment for recurrent solitary fibrous tumor invading atlas

“…SFT is known as a tumor originating in the pleura but rarely seen in the parapharyngeal space . Histologically, the spindle cells shows a “patternless pattern” proliferation and tumor cells are positive for CD34 but negative for S‐100 as seen in our case . Although SFTs usually behave as benign soft tissue tumors, malignant variants with more aggressive local behavior and metastasis may occur.…”

Solitary Fibrous Tumor of the Sinonasal Cavity: CT and MR Imaging Findings

“…However, they are usually negative for cytokeratin, antiendomysial antibody, S-100 protein, smooth muscle actin, and desmin; these findings may help to exclude some lesions, like epithelial tumor, hemangiopericytoma, fibrosarcoma, and neurogenic tumor. Immunoreactivity with the marker CD34 was present in all 78 SFTs of the head and neck region reported by Abe et al 13 Sinonasal SFTs typically present as a slow-growing painless mass. Previous case series suggest that SFTs in this region show no sex predilection and tend to present after the fourth decade of life, 10,15,17 while our series had a male predominance.…”

“…Histopathologically, SFTs are characterized by the proliferation of spindle cells arranged in a whorled or patternless fashion within a background collagen stroma and have prominent vascularity in a hemangiopericytoma-like vascular pattern. 2,10,13,15 SFTs show a strongly positive expression for CD34 and moderately positive expression for vimentin and Bcl-2. However, they are usually negative for cytokeratin, antiendomysial antibody, S-100 protein, smooth muscle actin, and desmin; these findings may help to exclude some lesions, like epithelial tumor, hemangiopericytoma, fibrosarcoma, and neurogenic tumor.…”

“…SFTs of the sinonasal cavity are rare, with fewer than 30 cases reported in the English literature to date. [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] Although several case reports and clinical studies have mentioned imaging findings of SFTs in this region, 6,12,15 the specific imaging characteristics of sinonasal SFT have not been detailed in the literature. We present the CT and MR imaging features of 5 patients with sinonasal SFTs proved by histopathology.…”

Characteristics and prognosis of glomangiopericytomas: A systematic review

“…Because glomangiopericytoma, glomus tumor, and solitary fibrous tumor share characteristic ectatic branching vasculatures, they should be differentiated based on histologic and immunohistochemical findings. Glomus tumors and solitary fibrous tumors are less common than glomangiopericytoma in the sinonasal tract and are mainly the subject of case reports in the literature. Histologic findings of solitary fibrous tumors are quite different from those of glomangiopericytoma and glomus tumor.…”