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Biomedical subjects

A V Messina

Publications and source records attributed to A V Messina.

14 recordsLinked to original sources
PubMed1977

Cranial computerized tomography. A radiologic-pathologic correlation.

One hundred twenty-three patients having cranial computerized tomography (CT) within two months of death were reviewed to determine the accuracy of CT. Those patients having scans within two weeks of death on the 160-matrix EMI head scanner had a false-negative rate of 11%. Approximately one third of all lesions 1 cm or more were not demonstrated. Computerized tomography appears to be the most sensitive neuroradiologic diagnostic tool, but certainly is not infallible.

Adenocarcinoma↗
PubMed1976

Computerized tomography of the head: a preliminary report on its use in the diagnosis of internal auditory canal and cerebellopontine lesions.

Computerized tomography (CT) of the head in rapidly replacing other procedures in the diagnosis of lesions of the cerebellopontine angle and the internal auditory canal. The quality of the information is such that CT may become the only procedure necessary for the diagnostic examination. It substantially diminishes time, expense, and possible radiation hazard to the patient.

Cerebellar Neoplasms↗
PubMed1976

Computer tomography: the "resolving" intracerebral hemorrhage.

Two patients with a total of 4 intracerebral hemorrhages were examined by serial computer tomography (CT) over a period of up to 6 months, revealing a progressive decrease in lesion volume and density which eventually became less than that of the surrounding brain tissue. These changes were interpreted as complete clot resorption with cystic residue. However, postmortem examination revealed residual hematomas with no evidence of recent bleeding. Three of these correspond in size to those noted on the initial CT scans. Intraparenchymal hemorrhages have stages of organization and resolution which may simulate normal brain density without significant volumetric alteration.

Adult↗
PubMed1976

Computed tomography in metastatic disease of the brain.

Computed tomography has been found to be a more accurate diagnostic tool in the analysis of brain metastases than radionuclide scanning. Of 1,100 patients studied by CT scan, 57 showed evidence of intracerebral metastasis, and 14 showed evidence of hydrocephalus. Density levels below that of normal brain tissue were found in cases of metastases from the lung (13), breast (7), melanoma (4), kidney (3), lymphoma (3), and nasopharynx (1); levels above normal were found in cases of metastases from melanoma (8), lung (3), colon (3), chorionic carcinoma (2), osteogenic sarcoma (1), and kidney (1).

Adult↗
PubMed1976

Computed tomography: evaluation of the posterior third ventricle.

The normal computed tomography (CT) appearances of the posterior third ventricle and related structures are presented. Seventy-six patients with lesions directly involving this ventricle were studied by CT, and results of other neuroradiological procedures evaluated. Primary tumors, metastases, hematomas, infarcts, and cysts may be reliably distinguished by CT, particularly if contrast enhancement is utilized. Size and density resolution limit the direct visualization of the aqueduct of Sylvius; stenosis however may be inferred. Small infarcts may be difficult to demonstrate by the use of CT scans without contrast enhancement, yet be shown by isotope scans.

Arachnoid↗
PubMed1976

Neuroepithelial (colloid) cysts. Pathogenesis and unusual features.

A brief history of the theories of pathogenesis of the origin of neuroepithelial cysts is presented. An origin more diffuse than the paraphysis seems most likely in our opinion, and we attempt to substantiate this theory with several of the cases from our series. One posterior third ventricular neuroepithelial cyst and one in the fourth ventricle are demonstrated roentgenographically. Also included in our series are a case showing suprasellar calcification on plain skull roentgenograms, not previously reported in neuroepithelial cysts, and a case with a cyst measuring 9 cm, the largest neuroepithelial cyst yet reported.

Adult↗
PubMed1976

Computed tomography; the anatomic basis of the zone of diminished density surrounding meningiomas.

Computed tomography of meningiomas often demonstrates a zone of diminished density surrounding the actual tumor. This zone may be related to widening of the subarachnoid space, cerebral edema, tissue necrosis, or demyelination. A case is presented in which the anatomic basis of the zone of diminished density was shown on pneumoencephalography and at surgery to be an enlarged subarachnoid space.

Brain Neoplasms↗