-A 36 year-old black female, complaining of headache of one month's duration presented with nausea, vomiting, somnolence, short memory problems, loss of weight, and no fever history. Smoker, intravenous drugs abuser, promiscuous lifestyle. Physical examination: left homonimous hemianopsia, left hemiparesis, no papilledema, diffuse hyperreflexia, slowness of movements. Brain CT scan: tumor-like lesion in the splenium of the corpus calosum, measuring 3.5 x 1.4 cm, with heterogeneous enhancing pattern, sugesting a primary CNS tumor. Due to the possibility of CNS infection, a lumbar puncture disclosed an opening pressure of 380 mmH 2 0; 11 white cells (lymphocytes); glucose 18 mg/dl (serum glucose 73 mg/dl); proteins 139 mg/dl; presence of Trypanosoma parasites. Serum Elisa-HIV tests turned out to be positive. Treatment with benznidazole dramatically improved clinical and radiographic picture, but the patient died 6 weeks later because of respiratory failure. T. cruzi infection of the CNS is a rare disease, but we have an increasing number of cases in HIV immunecompromised patients. Diagnosis by direct observation of CSF is uncommon, and most of the cases are diagnosed by pathological examination. It is a highly lethal disease, even when properly diagnosed and treated. This article intends to include cerebral trypanosomiasis in the differential diagnosis of intracranial space-occupying lesions, especially in immunecompromised patients from endemic regions.
-Hypertrophic olivary degeneration (HOD) is a rare type of neuronal degeneration involving the dento-rubro-olivary pathway and presents clinically as palatal tremor. We present a 48 year old male patient who developed Holmes' tremor and bilateral HOD five months after brainstem hemorrhage. The severe rest tremor was refractory to pharmacotherapy and botulinum toxin injections, but was markedly reduced after thalamotomy. Magnetic resonance imaging permitted visualization of HOD, which appeared as a characteristic high signal intensity in the inferior olivary nuclei on T2-and proton-density-weighted images. Enlargement of the inferior olivary nuclei was also noted. Palatal tremor was absent in that moment and appears about two months later. The delayed-onset between insult and tremor following structural lesions of the brain suggest that compensatory or secondary changes in nervous system function must contribute to tremor genesis. The literature and imaging findings of this uncommon condition are reviewed.KEY WORDS: rubral tremor, midbrain tremor, Holmes' tremor, myorhythmia, palatal myoclonus. T T T T Tremor de Holmes em associação com degeneração olivar hipertrófica bilateral e tremor palatal: remor de Holmes em associação com degeneração olivar hipertrófica bilateral e tremor palatal: remor de Holmes em associação com degeneração olivar hipertrófica bilateral e tremor palatal: remor de Holmes em associação com degeneração olivar hipertrófica bilateral e tremor palatal: remor de Holmes em associação com degeneração olivar hipertrófica bilateral e tremor palatal: considerações cronológicas. Relato de caso considerações cronológicas. Relato de caso considerações cronológicas. Relato de caso considerações cronológicas. Relato de caso considerações cronológicas. Relato de caso RESUMO -Degeneração olivar hipertrófica (DOH) é um tipo raro de degeneração neuronal envolvendo o trato dento-rubro-olivar e se apresenta clinicamente como tremor palatal. Relatamos o caso de um homem de 48 anos que desenvolveu tremor de Holmes e DOH bilateral cinco meses após hemorragia em tronco encefálico. O intenso tremor de repouso foi refratário a farmacoterapia e injeções de toxina botulínica, mas foi enormemente reduzido após talamotomia. Ressonância magnética permitiu a visualização da DOH, que apareceu como um sinal intenso característico na oliva inferior em imagens ponderadas em T2 e densidade de prótons. Aumento do complexo olivar inferior também foi percebido. O tremor palatal era ausente naquele momento e apareceu cerca de dois meses depois. O início tardio do tremor após a lesão estrutural sugere que alterações compensatórias ou secundárias no sistema nervoso devem contribuir para a gênese do tremor. A literatura e os achados radiológicos dessa patologia incomum são revisados. PALAVRAS-CHAVE: tremor rubral, tremor mesencefálico, tremor de Holmes, miorritmia, mioclonus palatal.
-Introduction:Melanotic neuro e c t o d e rmal tumor of infancy (MNTI) is a rare tumor, locally aggressive, usually originated from maxilla and mandible and rarely from the skull. A case of a 4 monthold child presenting a bulging lesion in the midline of the occipitoparietal region with pro g ressive gro w t h is re p o rt e d . Case re p o rt: The neurologic examination had normal developmental milestones. Computerized tomography scan and magnetic resonance Image showed a highly enhancing tumor, dislocating anteriorly and inferiorly the superior sinuses. In order to prevent excessive bleeding, surgical resection was performed in three stages, with complete removal. Conclusion: Based on the absence of tumor recurrence, we believe in a favorable neurological prognosis and in a possible of cure, although the patient was not submitted to any adjuvant treatment.KEY WORDS: neuroectodermic melanotic tumor, cranial tumor, tumor of infancy.Tumor melanótico neuro-ectodérmico da Infância: relato de caso RESUMO -O tumor melanótico neuro -ectodérmico da infância é raro, localmente agressivo, originado da maxila ou da mandíbula, raramente originando-se da calota craniana. Relatamos o caso de um menino de 4 meses de idade que apresentava lesão abaulada com crescimento pro g ressivo no couro cabeludo. O exame neurológico apresentava desenvolvimento neuro-psicomotor adequado. A tomografia computadorizada e a ressonância magnética do encéfalo mostravam lesão que impregnava pelo contraste, deslocando anterior e inferiormente o seio sagital superior. Com o objetivo de prevenir o risco do sangramento excessivo, o procedimento foi realizado em três tempos, com remoção completa da lesão. Baseados na ausência de recidiva do tumor, acreditamos no bom prognóstico neurológico e na possibilidade de cura, embora o paciente não tenha sido submetido a nenhum tratamento adjuvante. PALAVRAS-CHAVE: tumor melanótico neuro-ectodérmico, tumor craniano, tumor da infância. D e p a rtment
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