BACKGROUND Choline is a new PET tracer that is useful for the detection of malignant tumor. Choline is a precursor of the biosynthesis of phosphatidylcholine, a major phospholipid in the cell membrane of eukaryotic cells. Malignant tumors have an elevated level of phosphatidylcholine in cell membrane. Thus, choline is a marker of tumor malignancy. METHOD The patient was a 51-year-old man with...

Myxomas are rare benign tumors arising from mesenchymal tissues throughout the body. These tumors are usually seen in the atrium of the heart and the jawbone. Involvement of the skull base with intracranial extension is extremely rare, and only a few cases of primary intracranial myxomas have been described in the literature. A rare case of primary myxoma of the temporal bone is presented in th...

Primary hemangiopericytoma of the rib is extremely rare and only a few cases have been reported. A 62-yr-old man presented with an aching chest pain and dyspnea. Thoracic computed tomography revealed a homogenous mass expanding the right seventh rib. A diagnosis of hemangiopericytoma was established by percutaneous needle biopsy. Preoperative embolization of the feeding vessels of the tumor was...

The overexpression of Twist and Slug and subsequent down-regulation of E-cadherin facilitate the acquirement of invasive growth properties in cancer cells. It is unclear which of these molecules are expressed in mesenchymal tumors in the central nervous system. Here, we investigated 10 cases each of hemangiopericytoma, solitary fibrous tumor, meningothelial, fibrous, angiomatous, and atypical m...

OBJECTIVE Although surgical resection is used to treat meningeal hemangiopericytoma (MHPC), there is a high risk of subsequent recurrence. This study investigated factors associated with treatment outcomes and recurrence in patients who had undergone surgical resection of intracranial MHPC. METHODS Fifteen patients underwent surgical treatments performed by one senior neurosurgeon between 199...

Hemangiopericytoma is a rare and characteristically hypervascular tumour. We report a case of hepatic metastases of hemangiopericytoma for which there was correlative imaging by ultrasonography, ultrasonography with second-generation contrast agent (BR1), computed tomography, gadolinium-enhanced, Gd-BOPTA-enhanced and ferumoxides-enhanced magnetic resonance, and angiography. To our knowledge, t...

UNLABELLED Hemangiopericytomas are rare hypervascular tumors arising from Zimmerman's pericytes. They usually occur in the soft tissue, and intraosseous lesions are very rare. Surgical excision is the first choice for treatment. Many studies show that patients should be monitored for some time following treatment because of a high rate of recurrence and metastasis after radical resection. This ...

Hemangiopericytoma is an uncommon vascular tumor of unknown etiology. The tongue is the most common site for this tumor in the oral cavity. Literature review disclosed 20 cases of hemangiopericytoma of the tongue, four of which were in the pediatric population. The treatment of choice is wide surgical excision. This tumor has a high rate of recurrence and often a malignant transformation. The l...

Hemangiopericytoma is a rare perivascular tumor that often involves the extremities, pelvis, head and neck, and meninges, but rarely occurs in the kidney. The differentiation from renal cancer prior to surgery is extremely challenging; therefore, almost all cases of renal hemangiopericytoma are diagnosed by pathological examination. The majority of cases are identified in patients between the a...