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Biomedical subjects

C Manelfe

Publications and source records attributed to C Manelfe.

At least 109 records · Page 6Linked to original sources
PubMed1984

The accessory middle cerebral artery (AMCA). Diagnostic and therapeutic consequences.

The existence of the accessory middle cerebral artery (AMCA) is a rare anatomical variation with an estimated incidence of 0.31%. The embryological development of this artery is unknown. Three anatomical subtypes are described: in the type 1 variety the AMCA arises from the internal carotid artery; in the type 2, the AMCA originates from the proximal part of the anterior cerebral artery; in type 3, the AMCA arises from the distal part of the anterior cerebral artery. The use of endovascular techniques to treat cerebral vascular malformations requires knowledge of the anatomical subtype of AMCA and the brain regions it supplies (cortex, basal ganglia).

Adult↗
PubMed1983

[Digital subtraction angiography in ischemic cerebrovascular accidents].

Recent advances in computer and radiological technology have permitted reassessment of intravenous angiography in the evaluation of cerebrovascular disorders. Although digital subtraction angiography is a relatively new technique, it has rapidly gained a widespread acceptance. It has extended the use of angiography to outpatients and to people in whom conventional angiography is contraindicated. This reliable, safe, and relatively noninvasive technique offers the user two benefits: real-time subtraction and enhanced image quality. The system allows angiographic evaluation of the extracranial and intracranial vessels by means of intravenous injection of contrast material. Extracranial studies clearly demonstrate stenoses and occlusions of the major cervicocephalic arteries. Intracranial studies usually detect major cerebrovascular occlusions and provide insight into the collateral flow patterns. Intravenous digital subtraction angiography permits accurate assessment of cervicocephalic vessels after surgical repair. Although intravenous digital subtraction angiography obviates the need for conventional angiography in many cases, movements from the patients, or superimposition of vascular structures can substantially degrade the quality of the images. Digital subtraction angiography with intra-arterial injection of contrast medium will be contemplated in patients with poor intravenous digital subtraction angiography studies prior to surgery.

Cerebral Angiography↗
PubMed1982

[Haemorrhages of the posterior fossa in full-term newborns (author's transl)].

Four cases of non-traumatic haemorrhage of the posterior fossa in full-term newborns are reported and compared with the 30 cases already published. Computerized tomography is the only method that permits both a diagnostic and a therapeutic approach. Surgery is indicated in the presence of brain stem compression but should be carefully discussed in cases of intracerebellar haemorrhage with secondary extension to the posterior fossa. Early hydrocephalus is common and requires shunting in about 25% of the cases

Cerebellar Diseases↗
PubMed1982

Cerebrospinal fluid rhinorrhea: evaluation with metrizamide cisternography.

Metrizamide computed tomographic cisternography was used to examine 27 patients (19 males and eight females, 14-59 years old) clinically suspected of having cerebrospinal fluid fistulae with rhinorrhea. Twenty-one fistulae were traumatic and six were spontaneous. Five to 6 ml of metrizamide (or lopamidol, two cases) were injected by lumbar puncture at a concentration of 185-200 mg I/ml for direct coronal and axial computed tomographic sections of the skull base. Cerebrospinal fluid rhinorrhea was present at the time of examination in 12 of 27 cases. Results were evaluated according to three criteria: (1) metrizamide passage through the bony and dural defect; (2) demonstrable site of the fracture and/or bony defect; and (3) metrizamide visualized within a paranasal sinus, nasal cavity, or cotton pledget. The examination was considered positive when criterion 1 alone was present and when 2 and 3 were associated. In 15 of 27 cases, cisternography was positive, with the exact site of cerebrospinal fluid leakage demonstrated in 10 patients. In six cases, the results were not definitive; only one of the criteria (2 or 3) was fulfilled. In six cases, cisternography was normal. Seventeen patients underwent surgery. The site of cerebrospinal fistulae was ethmoidal in nine cases, frontoethmoidal in seven, sphenoidal in two, and sphenoethmoidal in one. The relative value of metrizamide computed tomographic cisternography compared with other diagnostic studies, polytomography, positive or negative contrast studies, and radionuclides, is discussed. Diagnostic pitfalls include artifacts and partial volume effect.

Adolescent↗
PubMed1981

Relative value of computed tomography and hypocycloidal tomography in the diagnosis of pituitary microadenoma. A radio-surgical correlative study.

The relative value of a second generation CT scanner and complex motion polytomography are compared in 36 patients undergoing transsphenoidal surgery due to clinical and biological evidence of pituitary hypersecretion. CT findings of focal glandular hypodensity in 17 patients and upward convexity of the sellar contents in 15 patients suggested the presence of a pituitary microadenoma. Complex motion tomographic findings suggesting a microadenoma were found in 21 of 32 cases and included bulging of the sellar floor or localized thinning of the lamina dura. Selective transsphenoidal adenomectomy was performed on 34 of the 36 patients and the preoperative location based on CT scanning data was positively correlated with surgical results in 75% of the cases. When there is a strong clinical suspicion of pituitary hypersecretion both CT and polytomography may suggest the existence and location of a microadenoma. CT should be the radiographic technique of choice since it produces accurate information as to the size and density of the pituitary gland.

Adenoma↗
PubMed1981

Metrizamide CT cisternography and perioptic subarachnoid space imaging.

Opacification of the perioptic subarachnoid space (PSAS) is a normal occurrence. Opacification depends on the anatomy of the meningeal layers surrounding the optic nerves. To determine the reliability and the most efficacious technique for opacifying the PSAS, a retrospective study of 200 computed tomographic cisternography studies with water soluble contrast medium (metrizamide or iopamidol) was undertaken. Of these patients, 32.5% had opacification of the PSAS. Opacification was facilitated by examining the patients in the prone position. Demonstration of the PSAS was frequently noted in patients with empty sella and rhinorrhea.

Adult↗
PubMed1981

[Partial monosomy 10p in a case investigated with tomodensitometry (author's transl)].

A new case of monosomy 10p without associated chromosomal abnormality is reported. This observation, compared with three others from the literature, shows the following common symptoms: microcephaly, antimongoloid slant of the palpebral fissures, low-set ears, prominent anthelix, congenital heart disease, abnormalities of the limbs. Cranial tomography demonstrates a midline developmental anomaly of the brain (cavum vergae associated with cavum septi pellucidi).

Brain↗