Solitary fibrous tumor (SFT) is a derived mesenchymal tumor from spindle cells, mostly occurred in the pleura. To analyze the clinical features of the SFT, data for a patient with SFT that involved in the pleura were retrospectively analyzed by assisted thoracoscope in the Affiliated Hospital of Zunyi Medical College in August 2015. The male patient was 45 years old, who showed the main clinical symptoms of chest pain, cough, sputum, and dyspnea. Large amount of right pleural effusion, chest space-occupying lesions were found by chest CT, suggesting a malignant tumor with metastasis at the 2nd and 3rd right rib. Immunohistochemical results showed: CD34 (+), cytokeratin (-), cytokeratin 5/6 (-), calretinin (-), epithelial membrane antigen(-), mesothelial cell (-), vimentin (++), Wilm's tumor-1 (+), Bcl-2 (+), CD56 (-), CD99 (+), desmin (-), and thyroid transcription factor-1 (-). It was diagnosed as SFT at right side wall layer pleura. SFT is a rare disease and it may occur at any site in the body. It lacks characteristic clinical symptoms and can be asymptomatic, or displays symptoms such as cough, chest pain, dyspnea, and hemoptysis. SFTs can only be conclusively diagnosed based on histopathologic and immunohistochemical characteristics of the tumor, and they are mostly benign. The main treatment for SFTs is the complete surgical resection. The prognosis for this disease is relatively good.
Calbindin 2 ; Humans ; Immunohistochemistry ; Male ; Middle Aged ; Prognosis ; Solitary Fibrous Tumor, Pleural ; diagnosis ; surgery ; Thyroid Nuclear Factor 1 ; Tomography, X-Ray Computed

OBJECTIVETo investigate the imaging features, clinical manifestations and pathological characteristics of solitary fibrous tumors (SFT).

METHODSThe clinicopathological manifestations and medical imaging findings were analyzed retrospectively in 27 patients with surgically confirmed SFT.

RESULTSThe SFTs originated from different parts of the body, including 18 in the chest, 4 in the abdomen, 1 in the lumboscral area, 3 in the pelvis, and 1 in the left shoulder. Twenty-three cases were found by CT scan, among which there were 16 benign diseases, presented with well-defined round or elliptic margins, with homogeneous attenuation and clearly surrounding; 6 malignant cases with unclear demarcations, invasive surrounding, heterogeneous attenuation due to calcification and/or irregular necrosis, and 1 junctional case with well-defined margins, which was enlarged during follow-up. There were 4 SFTs scanned by MRI with clear margin and homogeneous or heterogeneous signal intensity. All of the 4 cases were isointense or hyperintense to muscle on T1-weighted images, and were hyperintense on the T2-weighted images. All tumors showed heterogeneously intense enhancement with geographic pattern. Immunohistochemical staining showed that CD34-positive was 81.5%, vimentin (100.0%), CD99 (100.0%) and bcl-2 (96.3%), as well as negative CK (100.0%) and S-100 (96.3%).

CONCLUSIONThe location of SFT is varying. Though its clinical manifestations vary, the diagnosis is depended on pathology and immunohistochemistry. There are certain specific features related to SFTs on CT or MRI. These imaging techniques may serve to provide helpful information as to the location and vicinal anatomic structure of the tumor, which is of substantial importance for planning surgery.

12E7 Antigen ; Abdominal Neoplasms ; diagnosis ; metabolism ; pathology ; surgery ; Adult ; Aged ; Antigens, CD ; metabolism ; Antigens, CD34 ; metabolism ; Cell Adhesion Molecules ; metabolism ; Female ; Humans ; Magnetic Resonance Imaging ; Male ; Middle Aged ; Pelvic Neoplasms ; diagnosis ; metabolism ; pathology ; surgery ; Retrospective Studies ; Solitary Fibrous Tumor, Pleural ; diagnosis ; metabolism ; pathology ; surgery ; Solitary Fibrous Tumors ; diagnosis ; metabolism ; pathology ; surgery ; Tomography, Spiral Computed ; Vimentin ; metabolism ; Young Adult

Solitary fibrous tumor (SFT) is a rare mesenchymal neoplasm that typically presents as a well-defined lobular soft tissue mass commonly arising from the pleura. We report an extremely rare case of an SFT containing air arising from the right major fissure in a 58-year-old woman. Chest CT showed an ovoid air-containing cystic mass with an internal, homogeneously enhancing solid nodule. To our knowledge, this is the first case in the literature. The histopathologic findings were correlated with the radiologic findings, and the mechanism of air retention within the tumor is discussed.
Cysts/*diagnosis ; Diagnosis, Differential ; Female ; Follow-Up Studies ; Humans ; Middle Aged ; Pleura/*pathology/radiography/radionuclide imaging ; Positron-Emission Tomography/*methods ; Solitary Fibrous Tumor, Pleural/*diagnosis/surgery ; Thoracic Surgery, Video-Assisted ; Tomography, X-Ray Computed/*methods

OBJECTIVETo study the pathological characteristics, diagnosis and differential diagnoses of hemangiopericytoma-solitary fibrous tumor with giant cells.

METHODSPathological characteristics of seven cases of orbital and extraorbital hemangiopericytoma-solitary fibrous tumors with giant cells were evaluated by HE and immunohistochemistry (EnVision method).

RESULTSTwo cases were located in the orbit, one of which had recurred. Five cases were located in the extraorbital regions. Histologically, the tumors were well-circumscribed and composed of non-atypical, round to spindle cells with collagen deposition in the stroma. The tumors had prominent vasculatures and in areas, pseudovascular spaces lined by multinucleated giant cells lining which were also present in the stroma. Immunohistochemically, both neoplastic cells and multinucleate giant cells expressed CD34. Seven patients underwent tumor excision and were well and without tumor recurrence upon the clinical follow-up.

CONCLUSIONSHemangiopericytoma-solitary fibrous tumor with giant cells is an intermediate soft tissue tumor. It typically involves the orbital or extraorbital regions. Histologically, the tumor should be distinguished from giant cell fibroblastoma, pleomorphic hyalinzing angiectatic tumor of soft part and angiomatoid fibrous histiocytoma.

12E7 Antigen ; Adult ; Antigens, CD ; metabolism ; Antigens, CD34 ; metabolism ; Cell Adhesion Molecules ; metabolism ; Dermatofibrosarcoma ; pathology ; Diagnosis, Differential ; Female ; Follow-Up Studies ; Hemangiopericytoma ; metabolism ; pathology ; surgery ; Histiocytoma, Benign Fibrous ; pathology ; Humans ; Immunohistochemistry ; Male ; Middle Aged ; Neoplasm Recurrence, Local ; Orbital Neoplasms ; metabolism ; pathology ; surgery ; Proto-Oncogene Proteins c-bcl-2 ; metabolism ; Soft Tissue Neoplasms ; pathology ; Solitary Fibrous Tumor, Pleural ; metabolism ; pathology ; surgery ; Solitary Fibrous Tumors ; metabolism ; pathology ; surgery ; Young Adult