RESUMO
Cavernous malformations of the internal auditory canal are a rare clinical entity that, however, should be considered in the differential diagnosis of intracanalicular masses. Even though this type of malformation is usually associated with an evident gadolinium enhancement at MR examination, in some patients, like in this case, the signal characteristics may be not sufficiently specific to allow the correct preoperative diagnosis. Nevertheless, the clinical history, in particular, a rapid onset of cranial nerve deficits, lead to the suspicion of a vascular malformation.
Assuntos
Hemangioma Cavernoso do Sistema Nervoso Central/diagnóstico , Hemangioma Cavernoso do Sistema Nervoso Central/fisiopatologia , Osso Petroso/patologia , Nervo Vestibulococlear/patologia , Nervo Vestibulococlear/fisiopatologia , Adulto , Audiometria , Artéria Basilar/patologia , Artéria Basilar/fisiopatologia , Vasos Sanguíneos/patologia , Vasos Sanguíneos/fisiopatologia , Diagnóstico Diferencial , Nervo Facial/patologia , Nervo Facial/fisiopatologia , Doenças do Nervo Facial/diagnóstico , Doenças do Nervo Facial/etiologia , Doenças do Nervo Facial/fisiopatologia , Feminino , Perda Auditiva Neurossensorial/diagnóstico , Perda Auditiva Neurossensorial/etiologia , Perda Auditiva Neurossensorial/fisiopatologia , Humanos , Imageamento por Ressonância Magnética , Procedimentos Neurocirúrgicos , Osso Petroso/diagnóstico por imagem , Tomografia Computadorizada por Raios X , Resultado do Tratamento , Nervo Vestibulococlear/irrigação sanguíneaAssuntos
Doenças do Córtex Suprarrenal/diagnóstico , Hormônio Adrenocorticotrópico/fisiologia , Acalasia Esofágica/diagnóstico , Doenças do Aparelho Lacrimal/diagnóstico , Lágrimas/metabolismo , Testes de Função do Córtex Suprarrenal , Aldosterona/sangue , Pré-Escolar , Furosemida , Glucocorticoides/deficiência , Humanos , Hidrocortisona/sangue , Masculino , Sistema Renina-Angiotensina , Síndrome , TeofilinaRESUMO
Lipids were extracted from vegetative cells and spores of Clostridium botulinum. The total lipids extracted averaged approximately 3.8% of the dry weight of vegetative cells and 2.5% of the dry weight of spores of types 61E, "F," and 115B. The fatty acids were analyzed in the form of their methyl esters by gas-liquid chromatography. Infrared spectroscopy, mercuric acetate fractionation, and silver nitratethin layer chromatography served as complementary means of analysis. The total fatty acids included straight chain, saturated, unsaturated, and cyclopropane acids. Hexadecanoic and tetradecanoic acids were the predominant acids in both the spores and vegetative cells. Together, they comprised over 50% of the total fatty acids. Unsaturated acids were the second major group. These were primarily 7,8-tetradecenoic, 9,10-hexadecenoic, 7,8-hexadecenoic, 11,12-octadecenoic, and 9,10-octadecenoic acids. Nonproteolytic types 61E and "F" possessed an 18-carbon diunsaturate, which was not found in the vegetative cells or spores of proteolytic type 115B. A mechanism for the synthesis of unsaturated and cyclopropane acids was proposed.