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Biomedical subjects

S Bhimani

Publications and source records attributed to S Bhimani.

At least 19 recordsLinked to original sources
PubMed1990

Cerebral infarct in patients with hemorrhagic shock and encephalopathy syndrome.

The syndrome of hemorrhagic shock and encephalopathy (HSE) was first described by Levin et al. in 1983 but not until recently has it been considered to be a newly identified devastating disorder. The main features of this syndrome consist of sudden onset of shock, coma, convulsions, coagulopathy, renal and hepatic dysfunction. The mortality rate is very high with surviving patients suffering from severe neurologic sequelae. In review of the literature, we did not find any reports of cerebral infarcts. Recently we managed two patients with this syndrome, both of whom had CT scan findings consistent with cerebral infarctions.

Brain Diseases↗
PubMed1989

MRI in multifocal eosinophilic granuloma: staging disease and monitoring response to therapy.

Multifocal eosinophilic granuloma is part of the spectrum of histiocytosis X, in which the unifying feature is the proliferation and infiltration of histiocytes. Central nervous system (CNS) involvement has a predilection for the hypothalamic nuclei, and these infiltrates appear as high signal foci on T2-weighted magnetic resonance (MR) images that completely resolve after effective chemotherapy. Intradiploic skull lesions are well delineated with MRI, and the relation to underlying brain may be confidently assessed. MRI is the procedure of choice for staging multifocal eosinophilic granuloma in the skull and CNS, as well as for monitoring response to therapy.

Antineoplastic Combined Chemotherapy Protocols↗
PubMed1985

Intracranial teratoma associated with agenesis of the corpus callosum.

Several intracranial tumors are known to occur in conjunction with agenesis of the corpus callosum. We report the occurrence of a teratoma with callosal agenesis, an association not previously described, and suggest that the tumor's ventral location may serve to differentiate it from other lesions.

Adult↗
PubMed1985

Intracerebral pneumatocele: CT findings.

Two cases of intracerebral pneumatocele following trauma are presented. One to two months after initial treatment both patients had deteriorating neurologic status. The diagnosis was made by radiography. When a pneumatocele is suspected clinically, computed tomography can play a vital role in determining the precise location of the gas collection, its relationship to the fracture site, and the amount of mass effect on the brain.

Accidents, Traffic↗
PubMed1985

Computed tomography of temporal bone pneumatization: 1. Normal pattern and morphology.

The pneumatization of 141 "normal" temporal bones on computed tomography (CT) was evaluated in 100 patients (age range, 6-85 years). Because of the controversy surrounding the sclerotic squamomastoid (mastoid), temporal bones with this finding were discarded. A CT index of pneumatization was based on the pneumatized area and the number of cells seen within a representative scanning section. Results suggest that squamomastoid pneumatization follows the classic normal distribution and does not correlate with age, gender, or laterality. A high degree of symmetry was found in 41 patients who had both ears examined. In 35% of all temporal bones, the petrous apex was pneumatized, concordant with the findings of other investigators. Pneumatization extending into other regions of the temporal bone corresponded linearly with squamomastoid pneumatization. Air-cell configuration was variable. Air-cell size tended to increase progressively from the mastoid antrum. The scutum "pseudotumor" appearance caused by incomplete pneumatization was seen frequently, and should not be mistaken for mastoiditis or an osteoma. Thick sections producing partial-volume effect may also produce this spurious finding. Therefore, when searching for mucosal thickening due to mastoiditis, large air cells should preferably be analyzed.

Adolescent↗
PubMed1984

Computed tomography in penetrating injury to the eye.

We used computed tomography to detect and localize foreign bodies in two unusual cases of penetrating injury to the eyes. In one case, a large broken twig appeared to have penetrated the globe and the inferior rectus muscle; in the other, the globe was ruptured by many glass shards . In the first case surgery showed the computed tomographic impression to be incorrect. The globe and the inferior rectus muscle were intact and vision and motility were normal postoperatively. In the second case, swelling made direct visualization impossible, and computed tomography was used to locate the foreign bodies.

Adult↗
PubMed1984

Interhemispheric fissure sign of dysgenesis of the corpus callosum.

Failure to develop of the corpus callosum and the neighboring midline structures results in abnormal proximity between the interhemispheric fissure (IHF) and the third ventricle. We have called this finding the IHF sign of dysgenesis of the corpus callosum (DCC). In a retrospective study of 39 cases the presence of the IHF sign was assessed in conjunction with the other well recognized CT manifestations of the disorder. These are: (a) lateral ventricles: pointing of the frontal horns, disproportionate enlargement of the occipital horns and separation of bodies of the lateral ventricles; (b) third ventricle: enlargement, elevation and anterior displacement; and (c) interventricular foramen: enlargement. We found that the IHF sign was present concurrently with the other CT signs of DCC in all 35 cases (100%) where the quality of the CT scans permitted its satisfactory evaluation; in the remaining four the sign could not be assessed because of the unsatisfactory quality of the CT scans. Our study confirms that the IHF sign is an additional reliable CT feature of DCC.

Adolescent↗
PubMed1984

Prolactin-secreting pituitary adenomas: CT appearance in diffuse invasion.

The authors describe 2 diffusely invasive prolactin-secreting pituitary adenomas which produced marked destruction of the base of the skull thought to be diagnostic of chordoma on computed tomography (CT). Failure to recognize this pattern led to biopsy, which was diagnostic. The authors emphasize the need to recognize this rare growth pattern of diffusely invasive pituitary adenoma on CT.

Adenoma↗
PubMedDate not supplied

Computed tomography in the study of the development of the skull base: 1. Normal morphology.

We examined 11 human fetuses (18 to 30 weeks' gestation) with high resolution CT to study the developmental ossification of the two main component structures of the skull base, the temporal and sphenoid bones. Computed tomography, with its excellent contrast discrimination, allowed clear visualization of the morphology of ossifying centers. Skull base growth during this gestational period was found to be a dynamic event with rapid changes in morphology and interosseous relationships. The growth of the sphenoid body on CT corroborates the studies done by Kodama, who used dehydrated skulls. The temporal bone proceeded in a stepwise fashion; complete encapsulation of the membranous labyrinth occurred before it grew anteroposteriorly to form the apex and mastoid.

Gestational Age↗
PubMedDate not supplied

Computed tomography of cerebrovascular calcifications in postsurgical hypoparathyroidism.

Despite the extensive literature on the radiographic appearance of basal ganglia calcification in hypoparathyroidism, the vascular and perivascular deposits that are the hallmark of this disease have not been described radiographically. We report two patients with postsurgical hypoparathyroidism in whom such vascular calcification was observed on CT and was confirmed pathologically in one. The metabolic disturbance leading to the vascular deposits is discussed.

Aged↗
PubMedDate not supplied

Computed tomography of temporal bone pneumatization: 2. Petrosquamosal suture and septum.

The degree of visualization of the petrosquamosal (Körner's) septum on high-resolution axial computed tomography (CT) in 141 temporal bones (100 subjects) was analyzed. The superior and inferior parts of the septum were assessed separately and were seen in 75% and 41% of cases, respectively. There was no relation between the size of Körner's septum and pneumatization. The clinical relevance of this finding is discussed. The CT features of the ventral petrosquamosal suture also were investigated. The crista tegmentalis, a contribution of the petrosal tegmen to the mandibular fossa, was seen on CT as a polypoid excrescence projecting from the ventrolateral petrous pyramid. This knowledge is useful in the radiographic analysis of the course of longitudinal fractures of the petrous bone.

Cranial Sutures↗
PubMedDate not supplied

Skull phylogeny: an investigation using radiography and high-resolution computed tomography.

To demonstrate the phylogenetic changes that have led to the current form of the human skull, dried skulls of various representative vertebrates were examined using plain radiography and high-resolution computed tomography. The latter was chosen rather than pluridirectional tomography in anticipation of its future role as the major method for imaging the skull base. The phylogenetic history of the human skull is reviewed by considering separately the evolution of the calvarium, zygomatic arch, palate, jaw, and skull base.

Anatomy, Comparative↗