Meningiomas (Continued)
Because the majority of meningiomas are very slowly growing, the brain has time to adapt to the enlarging mass. Thus tumors in the frontal or occipital lobe can become quite…
Metastatic Tumors to Brain
Three mechanisms have been described for the development of metastases. For parenchymal lesions, the most common is hematogenous spread. Metastatic lesions are usually found at the junction between gray and…
Meningiomas
The WHO classification schema is based on histopathologic morphology and correlates with prognosis. WHO grade I lesions are considered benign and by far comprise the majority of meningiomas. These are…
Pediatric Brain Tumors (Continued)
Medulloblastomas are generally well-defined midline cerebellar lesions with regions of mineralization, intratumoral cysts and blood vessels and heterogeneous enhancement. Because of the propensity for medulloblastomas to disseminate, the entire neuroaxis…
Pediatric Brain Tumors
Pilocytic astrocytomas are World Health Organization (WHO) grade I tumors. They can occur in any region of the central nervous system, but frequently arise in the cerebellum of children. The…
Glioblastoma
Clinical Manifestations. As discussed above, signs and symptoms of underlying glioblastomas reflect the location of the tumor and its rate of growth. Because of the rapid rate of growth, symptoms…
Clinical Presentations of Brain Tumors
Clinical Manifestations. Traditionally, headaches, nausea and vomiting, and papilledema constitute the clinical triad of increased intracranial pressure. Headaches resulting from elevated intracranial pressure are generalized in location and usually are…
Neurosarcoidosis
Presentation may be with cranial nerve deficits from a basal meningitis, the most common being neuropathies that affect cranial nerves (CNs) VII, V, VIII, and II. Facial nerve (CN VII)…
Cryptococcal Meningitis
Patients present with headache, personality changes, irritability, somnolence, and cognitive changes. Intracranial pressure may be increased. There may be cranial nerve deficits. The diagnosis can only be made definitively by…
