RESUMO
Mercury toxicity causes postural tremors, commonly referred to as "mercurial tremors," and cerebellar dysfunction. A 23-year woman, 2 years after injecting herself with elemental mercury developed disabling generalized myoclonus and ataxia. Electrophysiological studies confirmed the myoclonus was probably of cortical origin. Her deficits progressed over 2 years and improved after subcutaneous mercury deposits at the injection site were surgically cleared. Myoclonus of cortical origin has never been described in mercury poisoning. It is important to ask patients presenting with jerks about exposure to elemental mercury even if they have a progressive illness, as it is a potentially reversible condition as in our patient.
Assuntos
Ataxia Cerebelar/induzido quimicamente , Córtex Cerebral/efeitos dos fármacos , Intoxicação por Mercúrio/diagnóstico , Mioclonia/induzido quimicamente , Adulto , Ataxia Cerebelar/diagnóstico , Progressão da Doença , Disartria/induzido quimicamente , Disartria/diagnóstico , Eletromiografia/efeitos dos fármacos , Epilepsia Tônico-Clônica/induzido quimicamente , Epilepsia Tônico-Clônica/diagnóstico , Potenciais Somatossensoriais Evocados/efeitos dos fármacos , Feminino , Corpos Estranhos/patologia , Células Gigantes de Corpo Estranho/patologia , Humanos , Injeções Intravenosas , Mercúrio/administração & dosagem , Intoxicação por Mercúrio/patologia , Mioclonia/diagnóstico , Transtornos Psicomotores/induzido quimicamente , Transtornos Psicomotores/diagnóstico , Pele/efeitos dos fármacos , Pele/patologiaRESUMO
Orbital cysticercosis with both ocular and extraocular involvement is common in endemic areas. The presence of scolex is considered diagnostic of cysticercosis. We sought to compare multi-slice CT and 3D steady state MR in the identification of scolex in orbital cysticercosis. Three patients with orbital cysticercosis (two extra-ocular, one ocular) were studied using multi-slice CT with thin coronal and sagittal reformations and 3D steady state MR (CISS 3D - Constructive Interference in Steady State) sequence.
Assuntos
Doença da Altitude/complicações , Hipóxia/complicações , Doença de Parkinson/etiologia , Doença de Parkinson/patologia , Transtornos da Personalidade/etiologia , Doença da Altitude/psicologia , Encéfalo/patologia , Globo Pálido/patologia , Humanos , Hipóxia/etiologia , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Doença de Parkinson/psicologiaRESUMO
Cryptococcosis is a relatively common mycotic infection of the CNS caused by a ubiquitous saprophytic fungus. We present an unusual case of CNS cryptococcosis in an immunocompetent patient. Florid choroid plexitis resulted in the formation of intraventricular enhancing mass lesions that filled the ventricles and were hyperintense to associated periventricular edema on T2-weighted MR images. We also noted lesions corresponding to microcystic, dilated Virchow-Robin spaces in the basal ganglia that were characteristic of cryptococcal infection.
