Cerebellar degeneration with Hodgkin's disease: computed tomographic correlation and literature review.

A 62-year-old man with progressive cerebellar degeneration, corticospinal tract dysfunction, and mild dementia was found to have Hodgkin's disease. Serial computed tomographic studies revealed progressive cerebellar atrophy. The clinical features and neuroradiologic studies in nine previous cases are reviewed.

Postischemic hypervascularity of infancy: a stage in the evolution of ischemic brain damage with characteristic CT scan.

One to 2 weeks after severe brain ischemia, four infants developed an unusual vascular lesion with a characteristic appearance on computed tomography that has not been reported previously. Restricted areas (most frequently the basal ganglia and thalamus) displayed increased attenuation, which enhanced further upon infusion of contrast medium. Autopsy of one infant revealed that the CT abnormality corresponded to an extremely dense neovascular network which had almost completely replaced the parenchyma in that region.

Malignant nasopharyngeal tumors: a neurological and neuroradiological view.

Four cases of nasopharyngeal tumors are presented. The neurological complications of these lesions are discussed. The importance of the neuroradiological examination in different stages of these processes, particularly computed tomography, is emphasized.

Computed tomography of sphenoid wing meningiomas: tumor location related to distal edema.

A review of the computed tomography and clinical characteristics of a series of sphenoid wing meningiomas revealed a high incidence of edema involving the ipsilateral cerebral hemisphere. This edema frequently accounted for the clinical presentation indicating the non-localizing insidious nature of these tumors. The etiology of the edema appears to be related in parts to the location of tumor in the middle cranial fossa and its proximity to the major venous pathways of this area.

Angiographic demonstration of recanalization of the basilar artery.

This report details the clinical course and angiographic findings of a patient with intermittent vertebrobasilar insufficiency. Recanalization of the basilar artery was demonstrated during anticoagulant therapy. A review of the literature failed to disclose a previous report of this occurrence.

Unusual metastases from a medulloblastoma: case report.

Calvarial and extracranial metastases by hematogenous spread of primary intracranial neoplasms have been considered a rare occurrence. This report deals with the clinicopathological and radiological findings of a child with metastatic medulloblastoma. Correlation of serial postoperative computed tomography (CT) scans and the autopsy examination indicated hematogenous calvarial and intracranial spread of the primary lesion.

Sounds evoked by brain stimulation in the oyster toadfish Opsanus tau L.

Various regions in the brains of anesthetized oyster toadfish were electrically stimulated. Temporal properties of evoked sounds formed a continuum from simple to complex. One-to-one responses (one sound pulse for each stimulus pulse) and buzzes, elicited by stimulation in the caudal medulla and cervical spinal cord, were simpler than natural sounds.

Interhemispheric subdural hematoma.

The clinical presentation and surgical management of an interhemispheric subdural hematoma, a rare entity, is presented and the literature reviewed. Either hemiparesis, worse in the lower than the upper extremity, or lower extremity monoparesis is characteristic of this lesion. Computerized tomography (CT) is the preferred diagnostic procedure.

Keratoplasty for bullous keratopathy with intraocular lens.

The presence of a pseudophakos does not appear to introduce any greater hazard when keratoplasty is required because of corneal edema. This, together with the histories obtained from patients requiring such keratoplasty, strongly suggests that the insult to the corneal endothelium takes place at the time of placement of the intraocular lens in the great majority of cases. Of possible further significance is the fact that five of the sixteen patients who underwent keratoplasty had had secondary procedures to stabilize or to reposition the lens following the original lens implantation.

Acute appendicitis: efficacy of prophylactic preoperative antibiotics in the reduction of septic morbidity.

The course of 200 patients who recently underwent appendectomy at UCLA for acute appendicitis has been reviewed to determine the efficacy of preoperative systemic antibiotic prophylaxis in reducing septic morbidity after surgery. Among those with nonperforated appendicitis who were given gentamycin and clindamycin preoperatively, a reduction of infection rate from 10.2 to 5.

Seasonal and geographical variation of the mating call of the oyster toadfish Opsanus tau L.

The boatwhistle, the mating call of the oyster toadfish Opsanus tau L. undergoes a pronounced seasonal cycle. The fundamental frequency increases to a peak early in the summer and then decreases markedly in the middle of July.

Penetrating keratoplasty in herpes simplex keratitis. Recurrence in grafts.

A review of 231 penetrating keratoplasties performed for corneal disease due to herpes simplex keratitis shows that clear grafts may be obtained in 75% and satisfactory visual results in about 70% during a long-term follow-up. Over a three-year follow-up period, recurrence of the herpetic disease in the graft was observed in 12%. Over a longer period of follow-up, up to 15 years, the rate of recurrence increased to 47%.

Evaluation of intracerebral hematoma by computed tomography.

The CT scan appearances of acute intracerebral hematoma are usually diagnostic, and can be differentiated from hemorrhagic tumor and infarction. Some prognostic evaluations can be made, depending on the site and size of the hemorrhage. Sequential studies indicate resolution of the density of the hematoma over a period of approximately six weeks.

Lattice corneal dystrophy.

The clinical and histologic aspects of 34 primary and six reoperative keratoplasties for lattice corneal dystrophy are evaluated. Surgical and postoperative complications were minimal and not considered specific for lattice corneal dystrophy. Visual results were highly favorable in a long-term evaluation.

The role of tissue typing in corneal transplantation.

The ABO relationships of 150 corneal transplant recipients and their donors were evaluated as were IgG and IgM isoagglutinins in recipients receiving grafts from ABO-incompatible donors. The HL-A antigens of 43 corneal transplant recipients and their donors were determined as were the cross-matches of donor lymphocytes in selected cases. No relationships of significance between mismatched donors and recipients or presence of antibody in recipients against antigens of the donor for either ABO or HL-A systems were found.

ABO Blood groups and corneal transplantation.

A study of 150 corneal donor-recipient grafts, examined for ABO type, revealed that 25% of the grafts were from corneas from incompatible donors. Recipients with histocompatible sensitization exposures such as prior corneal transplant, one or more pregnancies, or one or more blood transfusions were no more likely to experience graft failure if the graft were from an ABO incompatible donor than from a compatible donor. Of 13 graft failures (8%), three of the failed grafts were from AB donors, a significant result.