RESUMO
Retroclival arachnoid cyst is a rare mass lesion, with only seven cases previously reported in literature. MR is the imaging modality of choice in its evaluation and in its differentiation from epidermoid cyst. The case reported here was surgically proved and had an uncharacteristic MR signal intensity that was higher than that of cerebrospinal fluid due to previous hemorrhage.
Assuntos
Cistos Aracnóideos/diagnóstico , Imageamento por Ressonância Magnética , Fossa Craniana Posterior , Feminino , Humanos , Pessoa de Meia-IdadeRESUMO
Intraoperative computed tomography (CT) with a dedicated, therapeutic scanner facilitated resection of intracranial tumors in nine patients. Major benefits of intraoperative CT included exact, multiplanar lesion localization, maximal surgical resection and immediate recognition of potential intraoperative complications such as intracranial hemorrhage. Three cases are presented in detail to demonstrate the surgical technique. No complications related to the use of intraoperative imaging occurred. Although total resection of malignant brain neoplasms remained an unrealized goal, intraoperative CT increased the surgical accessibility of malignant and benign lesions located in critical areas of the brain.
Assuntos
Neoplasias Encefálicas/cirurgia , Tomografia Computadorizada por Raios X , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Astrocitoma/cirurgia , Neoplasias Encefálicas/diagnóstico por imagem , Hemorragia Cerebral/cirurgia , Pré-Escolar , Craniotomia , Feminino , Glioblastoma/cirurgia , Hematoma/cirurgia , Humanos , Malformações Arteriovenosas Intracranianas/cirurgia , Período Intraoperatório , Masculino , Pessoa de Meia-IdadeRESUMO
A C-ring radiolucent head holder was designed to facilitate intraoperative computed tomography (CT) during resection of various intracerebral lesions. Important features of the procedure include rigid skull and CT table fixation, cranial access, and low artifact CT imaging performed during and after operation. A case of CT-assisted resection of an arteriovenous malformation is described.
Assuntos
Técnicas Estereotáxicas/instrumentação , Equipamentos Cirúrgicos , Tomografia Computadorizada por Raios X/instrumentação , Adolescente , Angiografia Cerebral , Hemorragia Cerebral/complicações , Hemorragia Cerebral/diagnóstico por imagem , Humanos , Malformações Arteriovenosas Intracranianas/complicações , Malformações Arteriovenosas Intracranianas/diagnóstico por imagem , Malformações Arteriovenosas Intracranianas/cirurgia , Período Intraoperatório , MasculinoRESUMO
The effects on feeding and drinking of various doses of droperidol, haloperidol and spiroperidol were studied in a number of paradigms. All three buryrophenones produced generally similar effects. After food deprivation, feeding was slightly increased at low doses but was decreased at the higher doses; the concomitant postprandial drinking was attenuated at all doses. Desalivate rats showed a marked attenuation of feeding (and prandial drinking) at low doses, but when wet mash was given instead of pellets and water a normal dose-response relationship was obtained. After water deprivation drinking was attenuated at all doses, and when food was also available during the drinking test the food intake was decreased in proportion to the drinking. Drinking was blocked more when food was present than in its absence. Insulin and 2-deoxyglucose induced feeding in sated rats was attenuated but not abolished by haloperidol. The findings are discussed relative to the role of activation and brain catecholamines in feeding and drinking.
