Glenn H. Roberson

Diagnosis of epidermoid tumor by computed tomography. Analysis and evaluation of findings.

Primary intracranial intradural extraventricular epidermoid tumor may be suggested by the findings on computed tomography (CT), which is also useful during the follow-up period. Epidermoid tumors may exhibit minimal symptoms and have usually spread far beyond their original site by the time they are found. Early detection, delineation, and characterization are possible with CT.

Evaluation of mucoceles of the paranasal sinuses with computed tomography.

Eighteen patients with mucoceles of the paranasal sinuses were studied by plain radiography, pluridirectional tomography, and computed tomography (CT). Sixteen of the lesions had a homogeneous appearance on CT but demonstrated variable absorption characteristics, with acutely infected mucoceles showing rim enhancement. Plain radiography and pluridirectional tomography were usually sufficient for making a diagnosis and defining the extent of the lesion, but CT more accurately demonstrated orbital and intracranial extension. Both transverse and coronal CT are essential for adequate evaluation.

The Narrow Lumbar Spinal Canal Syndrome

Abstract The narrow lumbar spinal canal syndrome is characterized by (a) constriction of the interpediculate and anteroposterior diameters of the bony canal, (b) thickening and vertical orientation of the laminae as well as thickening of the facets and pedicles, (c) difficult, often markedly uncomfortable lumbar puncture, (d) prominence of the defects caused by relatively small extradural lesions, with varying degrees of obstruction, and (e) sharp delineation of the nerve roots of the cauda equina. The “cauda equina syndrome” and intermittent neurogenic claudication may be observed. Thirty-three cases are reviewed, with emphasis on diagnostic criteria, myelographic appearance, and clinical aspects.

Radiation necrosis of the brain. Neuroradiological considerations with computed tomography.

SummaryIn cases with radiation necrosis of the brain, conventional neuroradiological examinations usually demonstrate only an avascular mass lesion impossible to differentiate from intracerebral tumor or hemorrhage. Computed tomography, performed in addition to angiography in three cases, consistantly demonstrated the radiation necrosis as a low density area exhibiting enhancement following infusion of contrast medium. The importance of recognizing radiation necrosis as a differential diagnosis to brain neoplasm is emphasized.

Computed tomography in primary malignant lymphoma of the brain.

Primary malignant lymphoma of the brain is a rare lesion characterized clinically by varied nonspecific neurologic deficits and usually a rapid fulminant deterioration and death. This course may be altered by radiotherapy, and early diagnosis assumes major importance. Laboratory tests. EEG. radionuclide scans, angiography, and pneumoencephalography may not show definite abnormality in the early stages. This report concerns four cases in which good correlation between the location of the brain lesion and the abnormality on computed tomography scan was demonstrated.

Computed Tomography of Acoustic Neuroma

Review of computed tomographic (CT) scans of 49 consecutive patients with surgically excised acoustic neuromas revealed positive scans in 80% following contrast enhancement, with 20% false negative scans. All tumors over 2 cm in diameter were shown by optimal scans with contrast enhancement. The positive scans were evaluated to determine the accuracy of the size of the lesions as predicted by the scan. A radiological approach to the evaluation of suspected acoustic neuromas is suggested.

Computed Tomography of the Paranasal Sinuses and Face: Part Ii. Pathological Anatomy

Computed tomography (CT) has added an important new dimension to the radiological evaluation of diseases of the paranasal sinuses and face. Using transverse and coronal scans, accurate assessment of the character and extent of mass lesions in this region can be achieved. Erosion of thin bony lamine and involvement of soft tissue structures of the face can be seen. Most important, CT is capable of precisely defining the extension of lesions into the pterygopalatine fossa, orbit, and cranial cavity, information that is essential for therapeutic planning.

Computed tomography of the paranasal sinuses and face: part I. Normal anatomy.

With the ability to image both bone and soft tissue structures, computed tomography (CT) is capable of visualizing many normal anatomical structures of the paranasal sinuses and face not seen with other radiological techniques. The superficial and deep fat planes, all of the muscles of mastication, and many of the facial muscles are readily identified. The extraocular muscles, optic nerves, and globes are clearly seen. The purpose of this report is to review the normal anatomy of the paranasal sinuses and face imaged by CT in both the transverse and coronal planes.

Computed Tomography of Masses in the Lacrimal Gland Region

Twenty patients with mass lesions in the lacrimal gland region were evaluated with computed tomography (CT). The extent of the mass and its relationship to the globe, optic nerve, and extraocular muscles were clearly seen. The CT appearance on plain scan and the presence or absence of contrast enhancement, bone involvement, and cystic components often suggested the specific pathological diagnosis. Although orbital ultrasonography and CT were frequently complementary, ultrasonography was more definitive in inflammatory diseases, while CT demonstrated better extraorbital extension.

Computed Tomographic Evaluation of Traumatic Spinal Injuries

A full radiological evaluation of patients who sustained traumatic injuries to the spine may be difficult to obtain due to the danger associated with manipulation. Computed tomography offers a new modality for simple and accurate evaluation; valuable information may be gained without the use of invasive methods.