malignant peripheral nerve-sheath tumor (mpnst) is a high-grade malignant tumor of ecto-mesenchymal origin comprising approximately 10% of soft-tissue sarcomas. they tend to occur associated with neurofibromatosis or sporadically. here we report a mpnst at an extremely rare location and behavior causing disappearance of the entire kidney. patient evaluation included clinical, biochemical and ra...

Osteosarcoma is a relatively uncommon malignancy however, it is the most common form of primary malignant bone tumors in human. Diagnosis and prognosis of patients with osteosarcoma is limited to clinico-radiopathological parameters, whereas molecular markers of tumor aggression have been poorly identified. Survivin, an inhibitor of apoptosis (IAP), is unique for its expression in human tumors ...

   Background and Objective: Gliomas are the most common primary brain tumors. Despite therapeutic advances, the majority of gliomas do not respond to either chemo or radiotherapy. CD117, the gene product of c-kit has been expressed in cells of glial tumors. Because gastrointestinal stromal tumors (GISTs) that express CD117 respond dramatically to treatment with tyrosine kinase inhibitors, ide...

High-grade meningiomas are rare extra-axial tumors, frequently causing brain invasion and prominent brain edema. Patients harboring high-grade meningiomas occasionally present with behavior changes. Data about frequency and prognostic importance of preoperative behavior changes in patients with high-grade meningiomas is missing. 86 patients with primary high-grade meningiomas were analyzed. Sta...