Neupsy Key

Introduction Epidermoid tumors are also called pearly tumors and cholesteatomas, and are benign tumors that account for approximately 0.1% of all intracranial tumors. , They typically arise from displaced dorsal…

Introduction Trigeminal schwannomas are rare benign primary intracranial tumors that arise from Schwann cells that are responsible for the myelin sheath around the nerve axons. They make up 0.1% to…

Introduction Vestibular schwannomas (VS) are also called acoustic neuromas and are benign primary intracranial tumors that form along the vestibulocochlear nerve from Schwann cells that are responsible for the myelin…

Introduction Choroid plexus papillomas (CPPs) are rare tumors that account for less than 1% of intracranial neoplasms, but account for up to 20% of the tumors in the first year…

Introduction Skull base chondrosarcomas are rare tumors that account for 0.1% of primary intracranial neoplasms. ­Chondrosarcomas are thought to arise from mesenchymal cells or from ­embryonal cartilage remnants of synchondroses,…

Introduction Cavernous malformations, also known as cavernomas and cavernous angiomas, account for approximately 5% to 15% of all central nervous system vascular abnormalities. They have an incidence that ranges from…

Introduction Chordomas are rare World Health Organization grade I slow-growing neoplasms that are thought to arise from remnants of the notochord. As a result, these tumors can occur anywhere along…

Introduction Esthesioneuroblastoma (ENB), which is also known as an olfactory neuroblastoma, is an uncommon sinonasal ­malignancy that has a propensity for local invasion into surrounding paranasal structures, including the eye…

Introduction The sinonasal cavities, which include the nasal cavity and ­paranasal sinuses (maxillary, sphenoid, frontal, and ethmoid), occupy a relatively small anatomic space, but can be afflicted by a variety…

Introduction Craniopharyngiomas are rare intracranial tumors with an incidence of 1 to 2 cases per million persons per year that are derived from pituitary gland embryonic tissue, and have a…