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.

Intracranial tuberculosis due to Mycobacterium bovis.

A case of intracranial tuberculosis due to Mycobacterium bovis is presented. Computed tomography (CT) identified multiple enhancing lesions which by biopsy proved to be intracranial tuberculomas. The CT appearance, epidemiology and bacteriology as well as pharmacotherapy of this uncommon entity are discussed.

Lymphomatous meningitis and steroid-induced epidural lipomatosis: CT evaluation.

A case of spinal cord compression secondary to steroid-induced epidural lipomatosis is reported. The epidural lipomatosis developed in a setting of spinal lymphomatous leptomeningitis secondary to adult T-cell leukemia/lymphoma, an unusual type of non-Hodgkin lymphoma with a high frequency of leptomeningeal involvement. Computed tomography was invaluable in diagnosing epidural lipomatosis, despite the concomitant spinal lymphomatous leptomeningitis.

Computed tomography of nontuberculous spinal infection.

The CT findings in 16 patients with nontuberculous spinal infections were reviewed. The specificity of certain CT features as well as the usefulness of intravenous contrast medium administration are discussed. The associated clinical presentations and predisposing factors are outlined.

CT of the base of the skull.

This article emphasizes the value of high-resolution CT scanning in evaluating the skull base. The use of axial and coronal sections, imaged at both bone and soft tissue windows, is emphasized, and a systematic approach to analysis of lesions of the skull base is offered.