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Biomedical subjects

K C Rao

Publications and source records attributed to K C Rao.

At least 37 records · Page 2Linked to original sources
PubMed1982

Epidermoid tumor of the fourth ventricle: use of metrizamide-computed tomography.

This report describes two cases of epidermoid tumor of the fourth ventricle diagnosed with metrizamide computed tomography. They both presented as a low-density lesion in the region of the fourth ventricle on computed tomography. They did not show any enhancement after intravenous injection of contrast medium and had no hydrocephalus. Metrizamide-enhanced computed tomography demonstrated the irregular fourth-ventricular filling defect characteristic of epidermoid tumors.

Adult↗
PubMed1982

Interhemispheric intradural cyst.

Intracranial intradural cyst represents a rare congenital malformation of the dura. Computed tomography and autopsy findings in a child with a rapid and progressive enlargement of the head indicated the presence of a large interhemispheric cystic mass. A large dural-like interhemispheric cyst was confirmed at autopsy.

Agenesis of Corpus Callosum↗
PubMed1981

CT-angiographic correlation in Sturge-Weber syndrome.

Sturge-Weber syndrome in its classic form can be easily diagnosed by CT. However, in the absence of the typical gyral calcification, the diagnosis can be missed on CT. Identification of the intracranial angiomatosis and the associated thrombosis, and thus the diagnosis, require angiography. Computed tomographic and angiographic findings in a case of Sturge-Weber syndrome with unusual clinical features is described.

Angiography↗
PubMed1981

Delayed carotid-cavernous fistula and multiple cranial neuropathy following basal skull fracture.

A case of basilar skull fracture associated with palsies of the 3rd through 10th cranial nerves on the ipsilateral side is presented. Three months after the initial injury, despite return of significant ocular movement, proptosis and conjunctival congestion heralded the onset of an ipsilateral carotid-cavernous fistula. Angiography revealed the presence of a carotid-cavernous fistula; however, the ipsilateral carotid artery was occluded in the neck. A single pathophysiological mechanism is proposed to account for this unique series of events.

Adult↗
PubMed1981

Computed tomographic findings in cerebral sinus and venous thrombosis.

Cerebral sinus and venous thrombosis were diagnosed by computed tomography (CT) and subsequently confirmed by other studies in eleven patients. CT revealed normal or small ventricles, hemorrhages, low-density areas, and increased density of dural sinuses and tentorium. CT in combination with appropriate angiographic studies is necessary for diagnosis and confirmation of sinus and venous thrombosis. Proper use of CT can result in decreased morbidity and mortality associated with this condition.

Adolescent↗
PubMed1980

CT findings in multicentric glioblastoma: diagnostic-pathologic correlation.

Computerized cranial tomography (CCT) and angiographic findings in three cases of multicentric glioblastoma are reported. Differentiation of multicentric glioblastoma from diffuse metastatic deposits or multiple abscesses can be difficult with CCT. Apart from demonstrating a mass effect in one case and tumor neovascularity in the second case, angiography did not provide additional helpful information. The pathological diagnoses of these lesions were confirmed by biopsy and subsequent autopsy. Pathological differentiation of the multifocal or multicentric nature of the glioblastoma can be made only at autopsy.

Adult↗
PubMed1980

Transverse sinus anomaly simulating a meningioma on CT scanning.

A rare, anomalously dilated right transverse sinus with involvement of the torcular herophili strongly suggested the appearance of a meningioma on CT scanning. Carotid and vertebral arteriography did not reveal the nature of the abnormality, since there was only faint opacification of the anomalous vessel, which was interpreted as a faint tumor stain. Transjugular venography was necessary to establish this diagnosis. When a similar lesion is encountered on CT scanning and the transverse sinus is not clearly seen on arteriography, venography should be carried out to determine if the appearance is due to occlusion by a mass or, as in this case, anomalous dilatation of the sinus.

Adult↗
PubMed1980

The role and limitation of CT in craniocerebral trauma.

CT is being utilized more often in evaluation of craniofacial and craniovertebral trauma. It is far superior to conventional pluri-directional tomography, since not only the complex fracture but also communication with the orbital or cranial contents can be demonstrated. The extend of soft-tissue trauma can also be better evaluated. However, there are limitations in utilizing CT as the sole modality in evaluating craniocerebral trauma. This article deals with the limitations of utilizing CT alone in evaluation of trauma.

Accidents, Traffic↗
PubMed1980

CT in head trauma: a review.

The diagnosis and management of head trauma has changed significantly with the availability of computed tomography. CT not only demonstrates the presence of a mass, but also delineates acute bleed from brain swelling. CT is useful in determining whether the hematoma is intracerebral or extracerebral, as well as its volume, extent, and multiplicity. CT provides the opportunity for noninvasive sequential studies in the management of the patient with severe head trauma. Sequential CT studies have also been useful in understanding the long-term effects of head trauma. CT has eliminated the need for other diagnostic studies in all but the most exceptional situations.

Adult↗
PubMed1980

Ct in spinal trauma.

The radiological evaluation of patients with acute spinal trauma has always been a challenging problem. Multiple radiological procedures are often necessary for complete evaluation of the extent of spinal injury. CT provides an ideal modality whereby accurate assessment of displacement of bony fragments as well as associated spinal cord and nerve root injury can easily be performed, eliminating the need for difficult radiological procedures.

Adolescent↗
PubMed1979

Computer assisted tomography in rapidly growing brain tumor.

A case of undifferentiated astrocytoma with rapid increase in size of the tumor as documented by sequential computer assisted tomography (CAT) of the head is reported. The case also demonstrates the sensitivity of computer assisted tomography in the detection of intracranial pathology, in the presence of fals localizing neurological findings.

Astrocytoma↗
PubMed1978

Interhemispheric subdural empyema: neuroradiological diagnosis.

A case of subdural empyema situated in the interhemispheric subdural space is described. CT scan is useful in the diagnosis and follow-up of intracranial inflammatory pathology. Selective angiography was helpful in the compartmental localization of the abscess in the interhemispheric subdural space, adjacent to the falx and tentorium by virtue of the hypertrophied tentorial meningeal arteries and vascular displacement. CT scans are also useful in follow-up of cerebral abscess after micropaque barium has been injected into the cavity as in this patient.

Brain Abscess↗
PubMed1977

Craniopharyngiomas in children: neuroradiological evaluation.

Craniopharyngiomas constitute one of the commonest tumors in the sellar and parasellar region in children. Most often total surgical removal is attempted. Prior knowledge of the extent of the tumor and adhesions to adjacent neurovascular structures is thus necessary prior to deciding the type of surgical intervention. This paper deals with the usefulness of multiple neuroradiographic studies in evaluating these bening neoplasms, based on nearly 50 cases of craniopharyngiomas.

Adolescent↗
PubMedDate not supplied

Morphology and dimensions of the thoracic cord by computer-assisted metrizamide myelography.

Computed tomographic (CT) measurements of the thoracic spine and its contents were obtained in 33 patients undergoing metrizamide myelography for various spinal disorders. Twenty-eight of these patients had symptoms referable to the cervical or lumbar region and form the basis of this study. Five patients had symptoms referable to the thoracic spine. Sagittal and coronal CT measurements of the thoracic cord and subarachnoid space were obtained in all cases. In addition, macroscopic measurements of the thoracic cord were obtained from 10 autopsies for correlation with the CT findings. The technical aspects of the measurements are discussed; the normal morphology of the thoracic cord and thecal sac is presented; and the metrizamide CT pattern associated with pathologic lesions involving the thoracic cord is analyzed.

Adolescent↗
PubMedDate not supplied

CT characteristics of a transplantable canine glioma model: preliminary kinetic analysis.

Experimental brain tumors can be produced in dogs through the intracerebral injection of 3 X 10(6) live tumor cells in either neonates or adult animals. Tumors are visible by computed tomography on day 8 postinjection. Most tumors appear as ring lesions with central lucencies and shaggy borders. By postinjection day 12, tumor volumes increase more than 10 times; the cell cycling time is about 1-3 days. The initial doubling time is about 1-2 days and corresponds to the in vitro doubling time of about 24 hr. The use of computed tomography to perform noninvasive kinetic analysis deserves further study. The transplantable canine glioma model would appear to be ideal for this purpose.

Animals↗