Solitary fibrous tumor (SFT) is a mesenchymal neoplasm that most commonly arises from the visceral or parietal pleura. Solitary fibrous tumor with a primary site in the filum terminale has not been reported previously in the literature. Here we report a case of SFT occurring in the filum terminale. The characteristic imaging feature of this tumor is hypointensity on T2-weighted images. Even tho...

A 31-year-old man presented with a 3-year history of progressive weakness and paresthesias of both legs. Spinal MRI revealed a 10-cm intraspinal tumor at T1-T5 with syringomyelia on both ends (figure, A–C). Surgery successfully resected the intramedullary tumor grossly (figure, D and E). Pathology suggested the diagnosis of solitary fibrous tumor (figure, F–P). Intramedullary solitary fibrous t...

Meningeal hemangiopericytomas (HPCs) are aggressive tumors characterized by a high rate of recurrence and delayed metastasis. Despite the malignant nature of these tumors, they often reach a large size with minor clinical presentations. To date, surgical treatment still remains the primary treatment of these tumors. HPC is a malignant tumor arising from pericapillary cells or Zimmerman pericyte...

Intracranial solitary fibrous tumors (ISFTs) are rare mesenchymal neoplasms originating in the meninges and constitute a heterogeneous group of rare spindle cell tumors that include benign and malignant neoplasms of which hemangiopericytoma is nowadays considered a cellular phenotypic variant. ISFT usually shows benign or indolent clinical behavior. We describe two cases of ISFT managed in our ...

The purpose of this study was to describe the magnetic resonance imaging (MRI) and computed tomography (CT) findings for solitary fibrous tumors (SFTs) in the extremities in correlation with histopathological findings. Between 2006 and 2013, 6 consecutive patients with SFT in an extremity were studied with MRI (6 patients) and CT (4 patients). Diffusion-weighted images were also performed in 3 ...

Ovarian carcinoid tumor is a rare neoplasm that may appear as a solid mass or often combined with teratomas or mucinous tumors. We report 2 cases associated with mucinous cystadenomas and describe their magnetic resonance imaging characteristics. On T(2)-weighted images, the tumors appeared as multilocular cystic masses with hypointense solid components as a result of abundant fibrous stroma in...

Fibrous tumors represent a diverse subtype of soft tissue tumors and can represent benign conditions as well as frankly malignant sarcomas. Desmoid tumors and dermatofibrosarcoma protuberans are more difficult to classify and tend to be considered in the intermediate risk category. They are distinct entities, but both are locally aggressive processes which are plagued with attendant morbidity a...