Hemangioblastoma cerebeloso y trombocitopenia: reporte de caso / Cerebellar hemangioblastoma and thrombocytopenia: report of one case

The association between vascular tumors and thrombocytopenia is rare. Kasabach-Merritt Syndrome is seen in childhood and is characterized by hemangiomas and thrombocytopenia. A 42 years-old man with a cerebellar hemangioblastoma and thrombocytopenia, admitted with a subarachnoid hemorrhage is reported. The patient was operated and required a splenectomy to manage the thrombocytopenia. After the splenectomy the patient developed a subdural hematoma that was operated. Despite the surgical treatment, the patient died.

Assessing a Dysplastic Cerebellar Gangliocytoma (Lhermitte-Duclos Disease) with 7T MR Imaging

Lhermitte-Duclos disease (LDD; dysplastic cerebellar gangliocytoma) is a rare hamartomatous lesion of the cerebellar cortex and this was first described in 1920. LDD is considered to be part of the autosomal-dominant phacomatosis and cancer syndrome Cowden disease (CS). We examined the brain of a 46-year-old man, who displayed the manifestations of CS, with 7 Tesla (T) and 1.5T MRI and 1.5T MR spectroscopy (1H-MRS). We discuss the possible benefits of employing ultrahigh-field MRI for making the diagnosis of this rare lesion.

Acute Comitant Esotropia in a Child With a Cerebellar Tumor

We report a case of acute comitant esotropia in a child with a cerebellar tumor. A 3-year-old boy was referred for management of a 9 month history of acute acquired comitant esotropia. On first presentation, the patient's angle of esodeviation was 50 prism-diopters (PD) at distance and near fixation without any lateral incomitance. The cycloplegic refraction revealed +0.75 diopters in both eyes. Very mild bilateral papilledema was found on the fundus examination, but the neurological examination did not reveal any other pathological findings. Brain MRI showed a 5 cm mass located in the midline of the cerebellum as well as hydrocephalus. The mass was completely excised and histological examination confirmed the diagnosis of pilocytic astrocytoma. Despite neurosurgery, the patient's strabismus remained unresolved. One year after neurosurgery, both medial rectus muscles were surgically recessed by 6 mm, resulting in esotropia of 8PD at distant and near fixation without restoration of bifoveal fusion at follow-up 2 years after the eye muscle surgery. Therefore, acute onset comitant esotropia in a child can be the first sign of a cerebellar tumor, even without any other neurological signs and symptoms.

Malignant Glioma Arising at the Site of an Excised Cerebellar Hemangioblastoma after Irradiation in a von Hippel-Lindau Disease Patient

We describe herein a malignant glioma arising at the site of the resected hemangioblastoma after irradiation in a patient with von Hippel-Lindau disease (VHL). The patient was a 25 year-old male with multiple hemangioblastomas at the cerebellum and spinal cord, multiple pancreatic cysts and a renal cell carcinoma; he was diagnosed as having VHL disease. The largest hemangioblastoma at the right cerebellar hemisphere was completely removed, and he received high-dose irradiation postoperatively. The tumor recurred at the same site 7 years later, which was a malignant glioma with no evidence of hemangioblastoma. The malignant glioma showed molecular genetic profiles of radiation-induced tumors because of its diffuse p53 immunostaining and the loss of p16 immunoreactivity. The genetic study to find the loss of heterozygosity (LOH) of VHL gene revealed that only the cerebellar hemangioblastoma showed allelic losses for the gene. To the best of our knowledge, this report is the first to show a malignant glioma that developed in a patient with VHL disease after radiation therapy at the site of an excised hemangioblastoma. This report also suggests that radiation therapy should be performed very carefully in VHL patients with hemangioblastomas.

Hemifacial seizures and cerebellar tumor: a rare co-existence.

We report a 4-year-old boy with multiple daily episodes of abnormal eye movements, hemifacial spasms. Neuro-imaging revealed a cerebellar tumor. We believe that this association constitutes a rare but important syndrome of epilepsy characterized by seizures of cerebellar origin.

Tic convulsif caused by cerebellopontine angle schwannoma

A case is presented of painful tic convulsif caused by schwannoma in the cerebellopontine angle (CPA), with right trigeminal neuralgia and ipsilateral hemifacial spasm. Magnetic resonance images showed a 4 cm round mass displacing the 4th ventricle and distorting the brain stem in the right CPA. The schwannoma, which compressed the fifth and seventh cranial nerves directly, was subtotally removed by a suboccipital craniectomy. Postoperatively, the patient had a complete relief from the hemifacial spasm and marked improvement from trigeminal neuralgia. The painful tic convulsif in this case was probably produced by the tumor compressing and displacing the anterior cerebellar artery directly.

Peduncular hallucinosis : an unusual sequelae of medulloblastoma surgery.

Peduncular hallucinations are formed visual images often associated with sleep disturbance and are caused by lesions in the midbrain, pons and diencephalon. In present case report, a four year child, who was operated for midline posterior fossa medulloblastoma developed peduncular hallucinations on 3rd post operative day. Traction trauma or the compression of mid brain was thought to be the most possible cause of hallucinations.

Neurofisiologia álgica na irritaçäo tentorial: descriçäo de um caso secundário a meduloblastoma / Neurophysiology of pain in tentorial irritation: description of a case secondary to a medulloblastoma

Relatamos o caso de paciente do sexo feminino, com 32 anos de idade, com sintomas álgicos na regiao occipital, compressivos de forte intensidade e com irradiaçao frontal, supraorbitária e orbitária esquerda, relacionada a movimentos de flexao e extensao do pescoço, com característica lancinante e duraçao de até 9 segundos. A investigaçao radiológica, clínica, neurocirúrgica e neuropatológica evidenciou um meduloblastoma que aderia à membrana tentorial promovendo espessamento e compressao das estruturas venosas desta regiao. Atribuímos ao estímulo mecânico sobre estas estruturas vasculares tentoriais as manifestaçoes álgicas envolvendo as conexoes entre o trigêmeo e os primeiros segmentos medulares cervicais.

Meduloblastomas: análise de 17 casos / Medulloblastomas: report of 17 cases

Os autores apresentam 17 casos de meduloblastomas operados no Serviço de Neurocirurgia do Hospital Cristo Redentor no período de 11 anos (1976-1986). Foi observada maior incidência em pacientes jovens (10 meses a 29 anos de idade) e no sexo masculino (2:1). Os sinais e sintomas mais comuns foram os relativos a hipertensäo intracraniana (HIC) e distúrbios cerebelares, sendo que o intervalo de tempo médio entre o início da sintomatologia e a hospitalizaçäo foi de dois meses e meio. Todos os pacientes foram submetidos a uma craniectomia suboccipital em posiçäo sentada, sendo a derivaçäo ventrículo-peritoneal (DVP) realizada previamente em cinco casos. A mortalidade pós-operatória foi de 29,4%

Tumor da regiäo do ângulo ponto-cerebelar com comprometimento visual / Ponto-cerebelar angle tumor with visual impairment

O autor relata um caso de "Neurioma do Acústico", com comprometimento grave na acuidade visual em ambos os olhos, em uma paciente de sexo feminino, com 41 anos, cor branca, nacionalidade brasileira, natural de Alegrete, RS