Search PubMed⌕ Search

Biomedical subjects

J J Sheldon

Publications and source records attributed to J J Sheldon.

32 records · Page 2Linked to original sources
PubMed1979

Differential diagnosis between normal pressure hydrocephalus and cerebral atrophy on computed tomography.

A brain computed tomography--cisternographic correlation of 48 cases suspected of having normal pressure hydrocephalus (NPH) was undertaken, observing that the enlargement of temporal horns correlates with abnormal cisternograms compatible with NPH, and appears to be a reliable differential feature from cases of cerebral atrophy with "ex-vacuo hydrocephalus". The results of this correlation and typical images are presented.

Atrophy↗
PubMed1979

The differential diagnosis of supratentorial enhancing lesions on computed tomography.

One hundred and fifty-one surgical, autopsy or clinically confirmed supratentorial lesions evaluated by Computed Tomography at Mount Sinai Medical Center were reviewed to determine if their etiology could be predicted by their pattern of enhancement after the intravenous bolus injection of an iodine containing contrast agent. Meningiomas, gliomas, metastases, primary lymphomas, cerebral infarcts, intracerebral hematomas, arteriovenous malformations, aneurysms and abscesses were evaluated. The different patterns of enhancement were defined as homogeneous, ring-like, vermiform and mixed. The differential diagnosis of each pattern of enhancement is presented. In addition, the different etiologies are also discussed as to the relative distribution of their patterns of enhancement, i.e.: homogeneous, ring, vermiform or mixed.

Brain Diseases↗
PubMed1978

Computed tomography of the thorax.

Computed tomography of the chest is found to be a useful method in selected cases. Lipomas of the chest and mediastinum can be specifically diagnosed. Extent of malignant pulmonary processes can be assessed for resectability, since it can detect mediastinal nodes not properly seen in conventional chest tomography. Computed tomography of the chest is indicated in these two diagnostic problems.

Aged↗
PubMed1976

Abnormal dynamic scintigraphy in hydrocephalus: a proposed mechanism.

Dynamic brain scintigraphy was performed on seven patients with documented hydrocephalus of various aetiologies. The patients had a characteristic abnormality consisting of lateral displacement of the proximal middle cerebral activity associated with a paracentral lucent zone. No focal areas of increased activity were identified on the static brain images. A proposed mechanism for these findings is discussed.

Aged↗
PubMed1976

Lumbar thermography in discogenic disease.

Thermography is a simple, noninvasive outpatient procedure which can be performed on patients with clinical symptoms of a herniated disk. A positive thermogram usually indicates that an abnormality will be found by myelography. However, the myelographic findings cannot be predicted by a negative lumbar thermogram.

Adolescent↗
PubMed1975

Dynamic scintigraphy of primary and secondary malignant intracranial neoplasms.

Dynamic images and arteriograms were reviewed in patients with proved primary and secondary malignant intracranial neoplasms. In 44% of the patients with glioblastomas and 23% of those with metastatic lesions, radioactivity appeared early in the dynamic imaging sequence. This was related to the presence of arteriovenous shunting on arteriography rather than to a tumor stain. Neither characteristic dynamic imaging patterns nor rapid arteriovenous shunting was seen in patients with astrocytomas.

Adult↗
PubMedDate not supplied

Lumbar spinal stenosis. Radiographic diagnosis with special reference to transverse axial tomography.

Spinal stenosis due to malalignment and/or hypertrophy of the bony margins of the spinal canal is a recognized cause of cauda equina compression and nerve root entrapment. The plain lumbosacral spine roentgenograms reveal the number of lumbar vertebrae, their alignment, their interpedicular distances, the height of the intervertebral disk spaces and the presence of osteophyte formation. It correlates poorly with encroachment on the spinal canal. The transverse axial tomogram directly demonstrates a cross-section of the spinal canal and will show abnormal areas of bone encroachment usually arising from hypertrophied lamina and articular processes. These narrow the posterior portion of the spinal canal and encroach on the lateral recesses. This examination does not demonstrate soft tissue hypertrophy and the stenosis may be even greater than what is apparent due to the bony encroachment. The myelogram expresses how the narrowed spinal canal affects the dural sac and its contained cauda equina. Not infrequently there is an associated herniated disk.

Constriction, Pathologic↗
PubMedDate not supplied

Holoprosencephaly classified by computed tomography.

Five cases are presented to demonstrate the computed tomographic (CT) spectrum of holoprosencephaly. The classifications of alobar, semilobar, and lobar types A and B holoprosencephaly are each represented, with an additional case of semilobar holoprosencephaly complicated by a subdural effusion.

Brain↗