OBJECTIVE This study was undertaken to assess a possible relationship between the tumor location and the incidence of World Health Organization (WHO) Grades II and III meningiomas. METHODS A retrospective review of 794 consecutive patients who underwent meningioma resection between January 1991 and March 2004 was conducted. Among these, 47 patients (5.9%) with WHO Grade II meningiomas and 16 ...

Although most meningiomas are benign, they have a surprisingly wide spectrum of clinical and histological characteristics. The WHO classification attempts to better predict the spectrum of clinical characteristics with a histological grading system based on statistically significant clinical-pathological correlations (1). There are three types of meningiomas in this classification; benign (WHO ...

Meningiomas, derived from arachnoid cap cells, are the most common intracranial tumor. High-grade meningiomas, as well as those located at the skull base or near venous sinuses, frequently recur and are challenging to manage. Next-generation sequencing is identifying novel pharmacologic targets in meningiomas to complement surgery and radiation. However, due to the lack of in vitro models, the ...

the clivus is the surface of a portion of the occipital and sphenoid bones in the base of the skull. (1)it is surrounded by the neurovascular structures of the brainstem, as well as internal carotid arteries. tumors of the clivus can be benign (chordoma)or malignant (chondrosarcoma).(2) chordomas are rare, aggressive, slow-growing, invasive, and locally destructive tumors that arise from the no...

ollier’s syndrome, a variant of multiple enchondromatosis, is a rare disease with an estimated prevalence of 1/100,000, characterized by multiple enchondromas, asymmetrically involving small bones of the hands and feet, especially the proximal phalanges. intracranial enchondromas, such as those arising from the skull base are extremely rare. herein, we report a 25-year-old female, known case of...

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Dr. Paulo Valdeci Worm – Rua Carlos Trein Filho 550 / 403 90450-120 Porto Alegre RS Brasil. E-mail: [email protected] Non-traumatic subdural haematomas are very rare especially those associated with intracranial meningiomas. Intracranial tumors hemorrhage occurs in 39% of all cases. They are a malignant pathology such as metastatic tumors or gliomas. They usually present with seizures hemip...

Abstract Background Despite the recent advances in skull base surgery, microsurgical techniques, and neuroimaging, yet surgical resection of clinoidal meningiomas is still a major challenge. In this study, we present our institution experience treatment anterior highlighting role extradural clinoidectomy improving visual outcome extent tumor resection. This prospective observational study condu...

Primary intraosseous meningiomas are uncommon. The osteolytic variants of these tumors are even rarer. When one reviews a bony skull lesion, the differential diagnosis is very wide and includes both malignant and benign diseases. In case of primary skull meningioma, correct diagnosis and total resection of the lesion ensures curative therapy. Presented is a case of osteolytic skull lesion not i...