Subarachnoid Hemorrhage and Aneurysms Main Text Preamble Trauma is, by far, the most common cause of intracranial subarachnoid hemorrhage. Traumatic subarachnoid hemorrhage occurs when blood from contused brain or lacerated…
Meningiomas and Melanocytic Lesions Main Text Preamble Meningiomas are the most common of all brain tumors, accounting for > 1/3 of all primary intracranial neoplasms and nearly 40% of nonmalignant…
Sellar Region Tumors and Tumor-Like Conditions Main Text Preamble The sellar region is one of the most anatomically complex areas in the brain. It encompasses the bony sella turcica and…
Hydrocephalus and CSF Disorders Main Text Preamble The brain CSF spaces include the ventricular system—a series of interconnected, CSF-filled cavities—and the subarachnoid space. This chapter begins with a brief discussion…
Inherited Metabolic Disorders Main Text Preamble Inherited metabolic disorders—a.k.a. inborn errors of metabolism—represent conditions in which a genetic defect leads to a deficiency of a protein (e.g., enzyme or nonenzyme…
Demyelinating and Inflammatory Diseases Main Text Preamble Once considered an “immune-privileged” site sequestered beyond the blood-brain barrier, we now know there is active and continuous immunologic surveillance in the CNS….
Toxic Encephalopathy Main Text Preamble The list of toxins and poisons that affect the CNS is long and continues to grow. Some agents are deliberately injected, inhaled, or ingested, whereas…
Dementias and Brain Degenerations Main Text Preamble One in three adults over 85 years old suffers from Alzheimer disease or other forms of dementia. New treatments to slow progression of…
Mesenchymal, Nonmeningothelial Tumors Main Text Preamble The terminology and pathologic features of benign and malignant mesenchymal, nonmeningothelial neoplasms originating in the CNS correspond to soft tissue or bone tumors found…
Ependymal Tumors Main Text Preamble Overall, ependymomas represent 2-3% of all primary CNS neoplasms. Approximately 30% affect children and adolescents, although ependymal neoplasms occur at all ages, encompass multiple tumor…
