Hemangiopericytoma (HPC) is a rare vascular tumor that originates from the pericytes of blood vessels. HPC has a propensity for metastasis and is frequently aggressive. HPC can grow rapidly and usually occurs in the base of the skull, falx, tentorium, or nearby sinus, but occurs in the spinal canal less frequently. Peripheral nerve tissue can be compressed by HPC, causing corresponding signs an...

Meningeal melanocytoma is a kind of extremely rare pigmented tumor of the central nervous system, which often occurs in the groove around the base of the brain and spinal pia mater. Age of onset is 40 to 50 years old, mostly presenting a benign course of disease and the prognosis is good. Case reports of partial invasion or metastasis from lesions are even rarer. This report described a case of...

Primary intracranial leiomyosarcomas are rare tumors that arise from the mesenchymal cells of the dura mater or cerebral blood vessels Here we report the case of an extra axial leiomyosarcoma in the right parieto-occipital region of a 19-year-old male who had normal clinical and laboratory findings. Diagnostic imaging showed bony destruction, dural involvement and no parenchymal invasion. No pr...

Perineural spread is mechanism of tumor dissemination along a nerve in the head and neck with decreased survival and a higher risk of local recurrence and metastasis. Even though several theories have been proposed, pathogenesis of perineural spread is poorly understood. Advances in diagnostic imaging and the development of new fronts like skull base surgery have brought a transcending change i...