Magnetic resonance angiography: technique and skull-base applications.

Cerebral angiography has become essential in the evaluation and management of extensive skull-base lesions. However, with a 2.6 percent incidence of neurologic complications and a 0.

Identification of early recurrence of primary central nervous system tumors by [18F]fluorodeoxyglucose positron emission tomography.

As aggressive neurosurgery and adjuvant therapy have become standard care for most patients with primary central nervous system (CNS) tumors, limitations of posttreatment neuroimaging techniques have become more apparent. Interpretation of computed cranial tomography (CT) and magnetic resonance imaging (MRI) in patients with brain tumors is complicated by changes related to surgery, corticosteroids, radiation, and chemotherapy. We investigated the role of 18F-2-fluoro-2-deoxy-D-glucose (FDG) positron emission tomography (FDG-PET) in these difficult diagnostic situations by obtaining FDG-PET scans in 5 patients following temporal lobectomy for epilepsy, in 5 patients with recurrent anaplastic gliomas before and after corticosteroid therapy, and in 5 patients after the development of histologically confirmed radionecrosis.

Gd-DTPA-enhanced MR imaging of leptomeningeal spread of primary intracranial CNS tumor in children.

Three children with known primary brain neoplasms and leptomeningeal disease were evaluated with MR imaging. Two of the patients had medulloblastoma and one had pineoblastoma. The presence of leptomeningeal tumor spread was established by positive CSF cytopathology in conjunction with compatible contrast-enhanced CT findings.