Diverse Presentation of Intraventricular Colloid Cysts – A Tale of Eight Cases

Introduction: Colloid cysts are one of the benign intracranial tumors most commonly occurring in the rostral part of the thirdventricle. These may present with varied spectrum of clinical features that poses challenges in clinical diagnosis. The presentationmay range from being asymptomatic to simple headaches, seizures, and even sudden death. Most of the symptoms can beattributed to the development of obstructive hydrocephalus. Chemical or aseptic meningitis is unusual complication posingcomplicating differential diagnosis. We describe eight such cases with wide variety of symptoms.Materials and Methods: We present a case series of eight cases of the third ventricle colloid cysts presented at our institute.Age of the patients ranged from 15 to 55 and five of them were females. All the clinical features were recorded from eachone of them. Computed tomography and magnetic resonance imaging were used to diagnose the condition. Four of themunderwent excision of the cyst in single stage either by open or endoscopic approach. Two patients underwent preliminaryventriculoperitoneal shunt done in the view of poor neurological status and craniotomy and excision was done in later stage. Inone patient bedside external ventricular drain was inserted for emergency decompression of ventricles. One patient is underserial radiological follow-up.Results: Eight cases that we observed had wide variety of symptoms. Six patients had chronic headache with progressiveseverity, and four of them had nausea with vomiting, three patients had seizures. The cysts in two patients were discoveredaccidentally, during the evaluation of seizures in one patient and others in evaluation of traumatic head injury. One elderly patienthad presented with psychiatric symptoms, drop attacks along with the features of normal pressure hydrocephalus. One teenagepatient presented with sudden deterioration and went into cardiac arrest even after emergency decompression of ventriclesdone. Seven of them underwent surgery and one of them succumbed. The surgery improved health in all other seven patients.Conclusion: Colloid cysts may present with a wide range and beyond expected neurological manifestations. The severity orrapid clinical deterioration does not exactly correlate with depending on the site, size of the cyst. Leaking cysts with chemicalmeningitis may further complicate the diagnosis. Hence, early diagnosis and surgery with complete removal of cysts offer betterclinical outcomes in those patients.

Strictly Intraventricular Craniopharyngioma: Case Report and Literature Review

Strictly intraventricular craniopharyngiomas are a rare topographical variety of craniopharyngiomas. The correct diagnosis is important in order to define the surgical planning, as the surgical access is different for suprasellar tumors with secondary invasion of the third ventricle. An image diagnosis may be difficult, though suggestive patterns exist. The aim of the present case report and literature review is to add to the scarce literature on strictly intraventricular craniopharyngiomas, as well as to remind the neurosurgeon of this rare diagnosis so that the proper treatment is provided.

Craniofaringiomas puramente intraventriculares constituem uma rara variedade topográfica dos craniofaringiomas. O diagnóstico correto é fundamental para a definição do plano cirúrgico, posto que o acesso a este tipo de tumor difere dos tumores suprasselares com invasão secundária do terceiro ventrículo. A confirmação por neuroimagem pode ser difícil, embora existam características sugestivas. A presente descrição de caso, bem como a revisão de literatura, visa contribuir com a escassa literatura a respeito de craniofaringiomas puramente intraventriculares, além de remeter o neurocirurgião a este diagnóstico raro para a adoção da conduta correta de tratamento.

Tratamiento endoscópico de quistes coloideos del tercer ventrículo / Third ventricle colloid cysts endoscopic approach

Introducción: los quistes coloideos (QC) son tumores benignos de crecimiento lento, que comprenden menos del 1% de los tumores intracraneales. Se presentan en adultos jóvenes y se ubican más frecuentemente en el techo del tercer ventrículo. El objetivo de este trabajo es presentar una serie de pacientes con QC del tercer ventrículo operados por vía endoscópica, analizar la técnica quirúrgica, ventajas y desventajas. Desarrollo: se realizó una búsqueda retrospectiva de pacientes operados por vía endoscópica, en el Servicio de Neurocirugía del Hospital Italiano de Buenos Aires, de tumores del tercer ventrículo en un período de 2 años (2013-2015), con diagnóstico de QC confirmado por anatomía patológica . Se identificaron cinco pacientes, tres mujeres y dos hombres, cuyo promedio de edad fue de 50 años. No hubo complicaciones perioperatorias y ninguno mostró recidiva en el lapso de observación. Conclusión: la vía endoscópica es una vía técnicamente simple y con muy baja morbilidad. Si bien no siempre puede realizarse una exéresis completa, los trabajos prospectivos permitirán definir si esto resulta suficiente para el control de la enfermedad. (AU)

Colloid cysts are benign, slow-growing tumors, comprising less than 1% of intracranial tumors. They occur in young adults and are more frequently located on the roof of the third ventricle. The objective of this study is to present a series of patients with Colloid cysts operated endoscopically and analyze advantages and disadvantages of this surgical technique. We performed a retrospective review of Colloid Cysts operated on endoscopically, at the Neurosurgical Department of Hospital Italiano de Buenos Aires in a period of 2 years (2013-2015). Five patients were identified, three women and two men whose average age was 50 years. No perioperative complications were observed, with no recurrences during the follow up period. Conclusion: the endoscopic approach is technically simple and has very low morbidity. Although a complete excision can not always be performed, prospective studies will allow us to define whether if is sufficient to control the disease. (AU)

Age-related cerebral ventricular volume changes in healthy elderly humans / Alterações volumétricas dos ventrículos cerebrais relacionadas a idade em idosos saudáveis

Introduction: Normal aging is associated with morphological alte-rations in brain. Ventricular system is located deep inside brain and reflect the overall process of parenchymal atrophy. Once neurode-generative disorders course with more prominent dilatation of brain ventricles, to establish normative volumetric parameters from Brazi-lian healthy old individuals is necessary, and it may be an additional tool on differentiation from the normal to pathological. Objective: To investigate brain ventricular volume changes in Brazilian healthy el-derly people. Methods: Transversal study using magnetic resonance imaging (1.5T) of the brain from 21 elderly healthy volunteers (67±6 years old). Data were assessed with manual segmentation techni-que. Regions of interest were the brain ventricles and intracranial volumes. Old (60-69 years old, 15 women) and Older (>69 years old) groups were created for analysis. Results: Volume of all ventricular compartments significantly increased (p<.001) with age, with excep-tion of the fourth ventricle. The third and lateral ventricles increased between groups 2.1- and 2.8-fold, respectively. Mean total ventricular volume was 1.2±.4% of intracranial volume in Old and 3.2±1.8% in Ol-der group (p<.001), which represents 15±6ml and 40±24ml (p=.001), respectively. We observed a moderate to strong positive correlation between ventricular volume and age, with the best correlation in the third ventricle (r=.710). Total intracranial volume diminished with age, but without statistical significance. Conclusions: Brain ventricles vo-lume increased significantly with age in healthy old individuals, with exception of the fourth ventricle. (AU)

Introdução: O envelhecimento normal está associado a alterações morfológicas do cérebro. O sistema ventricular está localizado pro-fundamente no encéfalo e reflete o processo global de atrofia do pa-rênquima. Uma vez que doenças neurodegenerativas cursam com dilatação mais proeminente dos ventrículos cerebrais, estabelecer parâmetros volumétricos de normalidade em nossa população idosa saudável se faz necessário, podendo ser uma ferramenta a mais para diferenciar o normal do patológico. Objetivo: Investigar alterações volumétricas dos ventrículos cerebrais em brasileiros idosos sau-dáveis. Métodos: Estudo transversal com imagens de ressonância magnética (1,5T) do encéfalo de 21 idosos saudáveis (68±6 anos, 15 mulheres). Os dados foram examinados por técnicas de segmenta-ção manual. As regiões de interesse foram os ventrículos cerebrais e o volume intracraniano. Criamos os subgrupos Idosos (60-69 anos) e Mais idosos (>69 anos) para a análise. Resultados: O volume de todos os ventrículos aumentou com a idade (p<0,001), com exceção do quarto ventrículo. O terceiro e os ventrículos laterais aumentaram 2,1 e 2,8 vezes, respectivamente, entre os grupos. O volume ventri-cular médio foi de 1,2±0,4% do volume intracraniano nos Idosos e de 3,2±1,8% nos mais idosos, o que representa 15±6ml e 40±24ml, respectivamente. Observamos correlação positiva de moderada a forte entre volume ventricular e idade, com a melhor correlação no terceiro ventrículo (r=0,710). O volume intracraniano diminui com a idade, sem significância estatística. Conclusão: os ventrículos cere-brais aumentam significativamente com o envelhecimento em idosos saudáveis, exceto o quarto ventrículo. (AU)

Chordoid Glioma of the Third Ventricle, a Rare Tumor with an Unexpected Outcome

Chordoid glioma is a rare tumor of the third ventricle whose imaging features are difficult to distinguish from other more common lesions in this location. There are only 83 cases described so far in the literature. Although gross total resection (GTR) is the treatment of choice, immediate postoperative mortality with this approach can be as high as 29%, and morbidity among survivors can reach 67%. We report a case of a male patient of advanced age, with a third ventricle mass lesion, who presented with a progressive right temporal hemianopia. Imaging was compatible with craniopharyngioma, meningioma or even metastasis. Chordoid glioma was not considered in the differential diagnosis. The patient underwent surgery and GTR was achieved. There were no postoperative complications, and the patient was discharged from the hospital three weeks later. Unexpectedly, two days afterwards, he suffered a major brainstem hemorrhagic stroke and, unfortunately, died.

O glioma cordoide é um tumor raro do terceiro ventrículo, e as suas características imagiológicas são difíceis de distinguir de outras lesões mais comuns nesta localização. Até a data presente, existem apenas 83 casos de gliomas cordoides descritos na literatura. A remoção macroscópica total destes tumores deve ser o tratamento de escolha; no entanto, a mortalidade pós-operatória imediata pode chegar aos 29%, e a morbilidade pode atingir os 67% entre os sobreviventes. Nós descrevemos o caso de um homem idoso com uma lesão tumoral no terceiro ventrículo, que se manifestou com uma hemianopsia temporal direita progressiva. Os exames de imagem eram compatíveis com craniofaringioma, meningioma ou até metástase. O glioma cordoide não foi considerado como uma das hipóteses no diagnóstico diferencial inicial. O paciente foi submetido a cirurgia, tendo-se obtido a remoção macroscópica total. Não houve qualquer complicação no período pós-operatório, e o paciente teve alta hospitalar após três semanas. Inesperadamente, dois dias após a alta clínica, o paciente sofreu um AVC hemorrágico do tronco cerebral, e acabou por falecer.

Clinical analysis of neuroendoscopy treatment of the third ventricle cysticercosis / 中国内镜杂志

Objective To investigate the surgical method of treating the third ventricle cysticercosis with neuroendoscopy and to discuss the related problems. Methods Clinical data of 7 cases of the third ventricle cysticercosis from July 2009 to December 2014 were retrospectively analyzed. Patients aged from 12 to 49 and all of them received endoscopic resection of the third ventricle cysticercosis and orally taken Albendazole after surgery. Results The symptoms of high intracranial pressure in patients show different levels of releasing, except 1 case with postoperative fever symptoms, the other patients had no other palpable complications. After rechecked by CT and MRI, the size and shape of ventricle of all patients improved to varying degrees and hydrocephalus symptoms was relieved that all cases were satisfactory. Conclusions The treatment of neuroendoscopy aimed to the third ventricle cysticercosis is simple, safe and with less postoperative complications, which should be the preferred treatmnt to the third ventricle.

Neuroendoscopic third ventriculostomy for chronic posttraumatic hydrocephalus / 中华创伤杂志

Objective To discuss the feasibility of neuroendoscopic third ventriculostomy for chronic posttraumatic hydrocephalus (PTH).Methods Nineteen cases of chronic PTH treated with neuroendoscopic third ventriculostomy between October 2010 and October 2014 were analyzed retrospectively.There were 13 males and 6 females, aged 11-57 years (mean, 36.3 years).Trauma resulted from traffic accidents in 14 cases, falls in 4 cases and blunt object hitting in 1 case.Of the 19 cases analyzed, 5 had Glasgow Coma Scale (GCS) score of 13-15, 5 had score of 9-12 and 9 had score of 5-8 at admission.Results of operation were assessed with the Canada multicenter evaluation criteria.Prognosis was analyzed with the Glasgow Outcome Scale (GOS).Results All cases were followed up for mean 13.6 months (range, 6-26 months).Improvement of symptoms was achieved in 17 cases, but was not seen in 2 cases.Of the 2 cases, one required ventriculoperitoneal shunt two weeks after ineffective ventriculostomy, and one required second ventriculostomy one month after the presence of stoma blockage.No serious complications occurred.At follow-up, 9 cases had GOS score of 5, 8 cases had score of 4 and 2 cases had score of 3.Conclusions Neuroendoscopic third ventriculostomy is in line with the physical characteristics in cerebrospinal fluid circulation, which implies no shunt implantation, less operative trauma and less complications.The procedure is an effective approach for chronic PTH.

Avaliação anatômica comparativa dos acessos transcorioideo e transforniceal transcorioideo ao terceiro ventrículo / Comparative anatomical assessment of transchoroidal approach and transforniceal transchoroidal approach to the third ventricle

O acesso ao terceiro ventrículo constitui verdadeiro desafio ao neurocirurgião. Nesse contexto, estudos anatômicos e morfométricos são úteis para estabelecer as limitações e as vantagens de determinado acesso cirúrgico. O acesso transcorioideo é versátil e promove exposição adequada da região média e posterior do terceiro ventrículo. Entretanto, a coluna do fórnice limita a exposição da região anterior do terceiro ventrículo. Há evidências de que a secção ipsilateral da coluna do fórnice tenha pouca repercussão na função cognitiva. Esta tese compara a exposição anatômica proporcionada pelo acesso transforniceal transcorioideo com o do acesso transcorioideo e realiza avaliação morfométrica de estruturas relevantes e comuns aos dois acessos. Material e métodos: A exposição anatômica proporcionada pelos acessos transcaloso transcorioideo e transcaloso transforniceal transcorioideo foram comparadas em oito cadáveres não submetidos à conservação, utilizando o sistema de neuronavegação (Artis, Brasília, Brasil), para aferir a área de trabalho, a área de exposição microcirúrgica, a exposição angular no plano longitudinal e transversal de dois alvos anatômicos (túber cinéreo e aqueduto cerebral). Adicionalmente, foram quantificados a espessura do parênquima do lobo frontal direito, a espessura do tronco do corpo caloso, o diâmetro longitudinal do forame interventricular, a distância de trabalho da superfície cortical ao túber cinéreo e a distância de trabalho da superfície cortical até o aqueduto cerebral. Os valores obtidos foram submetidos a análise de estatística utilizando o teste de Wilcoxon. Resultados: Na avaliação quantitativa, o acesso transforniceal transcorioideo proporcionou maior área de trabalho (transforniceal transcorioideo = 150,299 +/- 11,147 mm2; transcorioideo = 121,421 +/- 7,698 mm2; p < 0,05), maior área de exposição microcirúrgica (transforniceal transcorioideo = 100,920 +/- 8,764 mm2; transcorioideo = 79,944 +/- 4,954 mm2; p <...

Approaches to the third ventricle constitute a formidable challenge to the neurosurgeon and, in this context, anatomical and morphometric studies are useful to establish the limitations and advantages of certain surgical approaches. The transchoroidal approach is a versatile one that promotes adequate exposure of the middle and posterior regions of the third ventricle. However, the column of fornix limits the exposure of the anterior third ventricle region. There is evidence that the ipsilateral section of the column of fornix has little effect on the cognitive function. This thesis compares the anatomical exposure using the transchoroidal transforniceal technique with the transchoroidal approach, and performs morphometric assessment of relevant structures common to both approaches. Material and methods: The anatomical exposure achieved through the transchoroidal transcallosal approach and transchoroidal transforniceal transcallosal were compared in 8 fresh cadavers using the neuronavigation system (Artis, Brasilia, Brazil), to assess the working area, microsurgical exposure area, to quantify the angular exposure in the longitudinal and cross-sectional planes to two anatomical targets (tuber cinereum and cerebral aqueduct), to measure the thickness of the right frontal lobe parenchyma, corpus callosum body thickness, longitudinal diameter of the interventricular foramen, working distance from the cortical surface to the tuber cinereum and working distance from the cortical surface to the cerebral aqueduct. The values obtained were submitted to statistical analysis using Wilcoxon's test. Results: In the quantitative assessment, the transchoroidal transforniceal approach provided: larger working area (transchoroidal transforniceal = 150.299 +/- 11.147 mm2; transchoroidal = 121.421 +/- 7.698 mm2; p < 0.05), larger area of microsurgical exposure (transforniceal transchoroidal = 100.920 +/- 8.764 mm2; transchoroidal...

Large Mature Cystic Teratoma of the Third Ventricle in Infancy: A Case Report and Review of Literatures

Teratomas of the central nervous system are rare and are frequently found in children and young adults. Cystic teratomas found in infancy is a well-recognized but infrequent entity. Intracranial teratomas,like teratomas in general, tend to arise from midline structures such as the pineal gland, but has rarely been found in the third ventricle. We report a rare case of a 6-month-old infant with a mature cystic teratoma of the third ventricle with a review of literatures

Large Mature Cystic Teratoma of the Third Ventricle in Infancy: A Case Report and Review of Literatures

Teratomas of the central nervous system are rare and are frequently found in children and young adults. Cystic teratomas found in infancy is a well-recognized but infrequent entity. Intracranial teratomas,like teratomas in general, tend to arise from midline structures such as the pineal gland, but has rarely been found in the third ventricle. We report a rare case of a 6-month-old infant with a mature cystic teratoma of the third ventricle with a review of literatures

Expanded Endoscopic Transnasal Approach to the Chordoid Glioma of the Third Ventricle : The First Case Ever Reported

Chordoid glioma of the third ventricle is a rare and challenging tumor to surgery because of its unique anatomical location and its close juxtaposition to the neurovascular structures and hypothalamus. The authors report a case of chordoid glioma of the third ventricle in a 43-year-old woman, who presented with headache and somnolence. The tumor was approached by endoscopic transnasal technique with a favorable result. Histopathologic examination disclosed a neoplastic tissue composed of eosinophilic epithelioid cells, mucinous, periodic acid Schiff-diastase positive, extracellular matrix, and scattered lymphoplasmacytic infiltrates. The best treatment option remains controversial. Customarily, the surgical route to remove chordoid glioma is transcranial; however, the undersurface of the optic chiasm and optic nerves preclude an adequate surgical visualization. In contrast, an expanded endoscopic transnasal approach provides a direct midline corridor to this region without any brain retraction.

Modelo anatômico de ventriculomegalia para treinamento neuroendoscópico / Ventriculomegaly anatomical models for neuroendoscopy training

OBJETIVO: Desenvolver peças anatômicas que simulem uma condição real de ventriculomegalia para serem utilizadas como uma ferramenta no treinamento dos neurocirurgiões nas técnicas de neuroendoscopia e viabilizar estudo anatômico dos ventrículos. MÉTODO: Foram utilizadas vinte peças anatômicas de encéfalo de cadáveres de indigentes, com a aprovação do Comitê de Ética em pesquisa da FMUSP sob o número 046/10. As peças foram retiradas da base do crânio com a persistência da superfície óssea (parte da calvária) para serem submetidas aos seguintes procedimentos: canulação do IV ventrículo por meio da abertura mediana do IV ventrículo (forame de Magendie); tomografias pré-experimento e injeção de água destilada no sistema ventricular. A água injetada estava à temperatura ambiente e os cérebros foram resfriados até 4º C e, após 12 horas, foram congelados a uma temperatura de 0º C (no estado sólido) por 24 horas. Esses procedimentos foram realizados na frequência de três vezes. Após o experimento, foram realizadas tomografias pós-experimento e procedimentos neuroendoscópicos ventriculares. Foram excluídos encéfalos com lesões traumáticas ou antecedentes de enfermidades transmissíveis. Não foram critérios de exclusão o sexo e a idade. Foram avaliadas, nas imagens tomográficas, a variação pré e pós-experimento dos seguintes parâmetros: coeficiente corno frontal/diâmetro interno; índice de Evan; e tamanho do corno temporal. As análises estatísticas foram realizadas no programa SPSS (Statistical Package for the Social Sciences) versão 13, para ambos os grupos. RESULTADOS: A avaliação da relação Corno frontal/Diâmetro interno, antes e pós-experimento apresentou média de 11,98% e 19,46%, respectivamente. Estudo estatístico (t Student) mostrou diferença estatística (t= -5142, gl =19; p < 0,01). O Índice de Evan também apresentou diferença significativa (t = -5,172, gl = 9; p < 0,01) entre os resultados antes (média de 10,86%) e após experimento (média de 18,35%). A análise...

PURPOSE: To develop anatomical models which simulate real conditions of ventriculomegaly and to use them as tools to train neuroendoscopic techniques and allow the study of the ventricles. METHODS: A total of twenty brains, with the approval of the Ethics in Research Committee from FMUSP (046/10) were used to perform this research. The brains were separated from the skull base, but keeping part of the calvaria, and then underwent the following procedures: cannulation of the fourth ventricle through the median open of the fourth ventricle (foramen of Magendie); CT scans performed before the experiment; and then injection of distilled water into the ventricular system. The water was injected at room temperature, and then the brains were cooled to 4ºC. After 12 hours, they were then frozen at 0ºC for 24 hours.These procedures were repeated three times. After the experiment,CT scans were performed after the injections and neuroendoscopic procedures. Brains, which had traumatic injuries or history of infectious diseases, were excluded. Gender and age were not exclusion criteria. The statistical analysis was performed with the SPSS program (Statistical Package for the Social Sciences) version 13, for both groups. To assess the variation of the frontal horn (FH)/internal diameter (ID) coefficient, such as Evan's index's variation, and to analyze the temporal horn (TH) size, thet-Student test was used. RESULTS: The results of the t-Student test showed that the FH/ID, with an average of 11.98% before the experiment, had significant difference (t = -5.142, gl = 19; p < 0.01) after the experiment, with an average of19.46%. The Evan's index also showed a significant difference (t = -5.172, gl = 9; p < 0,01) with an initial average of 10.86% and a final average of 18.35%. The analysis of the temporal horn size showed a significant difference between the size before and after the experiment (t = -2.297, gl = 9; p < 0.01), indicating the significant increase of the temporal...

Chordoid Glioma Originating in the Intrasellar and Suprasellar Regions: Case Report

Chordoid glioma is a rare, low-grade brain neoplasm typically located in the third ventricle. Herein, we report an unusual case of histologically confirmed chordoid glioma located in the pituitary fossa and suprasellar region, not attached to the third ventricle. A 57-year-old woman presented with a 2-month history of headache and visual disturbance. Magnetic resonance imaging revealed an ovoid mass in the pituitary fossa and suprasellar region, compressing the optic chiasm without involvement of the third ventricle. The tumor showed low signal intensity on T1-weighted images and iso- to high signal intensity on T2-weighted images, with strong and homogenous contrast enhancement. Subtotal resection was performed via the transcranial approach, and the patient subsequently received adjuvant gamma knife radiosurgery. However, the residual mass showed disease progression 5 months after the initial surgery.

Intratumoral hemorrhage and deadly upward transtentorial herniation after endoscopic third ventriculostomy in the management of posterior fossa tumor-related hydrocephalus - case report and literature review / Hemorragia tumoral e herniação transtentorial ascendente fatal após terceiro-ventriculostomia endoscópica para tratamento de hidrocefalia secundária a tumor de fossa posterior - relato de caso e revisão de literatura

The management of hydrocephalus associated with posterior fossa tumors in children has always been controversial. Studies show that 71%-90% of children with posterior fossa tumors already presented hydrocephalus on admission. Of these cases, 10%-62% will have persistent hydrocephalus after surgical treatment of the tumor. The shunt, although it is an important alternative for preoperative treatment in these cases is not without complications. Among the numerous complications identified by the literature, we highlight the most rare, intratumoral hemorrhage, upward transtentorial herniation and dissemination of neoplastic cells by the peritoneum. Medulloblastoma is considered the most common malignant pediatric tumor, comprising 15%-20% of all intracranial tumors in childhood. In addition, 5%-6% of primary or recurrent medulloblastomas may be associated with spontaneous bleeding and rapid deterioration. The bleeding presents with tumor swelling, extending to the ventricular system through the tumor capsule, increased intracranial pressure and upward transtentorial herniation. Tumoral hemorrhage associated with ventricular drainage for treatment of hydrocephalus in patients with medulloblastoma represents an extremely rare phenomenon. The endoscopy third-ventriculostomy (ETV) is known to be very useful in the treatment of intracranial hypertension preoperatively and prevent persistent postoperative hydrocephalus in cases associated with posterior fossa tumors, with efficacy superior to traditional ventricular shunts. We describe a case of intratumoral hemorrhage and upward transtentorial herniation associated with endoscopic third-ventriculostomy (ETV).

O manejo da hidrocefalia associada a tumores de fossa posterior em crianças sempre foi controverso. Trabalhos mostram que 71%-90% das crianças com tumores de fossa posterior já se apresentam hidrocefálicos na admissão. Desses casos, 10%-62% terão hidrocefalia persistente após o tratamento cirúrgico do tumor. A derivação ventricular, embora consista em importante alternativa de tratamento pré-operatório nesses casos, não está isenta de complicações. Dentre as inúmeras complicações apontadas pela literatura atual, particularmente nos casos de meduloblastoma que necessitaram de derivação ventricular por hidrocefalia, destacamos as mais raras: hemorragia tumoral, herniação transtentorial ascendente e disseminação de células neoplásicas pelo peritônio. O meduloblastoma é considerado o tumor pediátrico maligno mais comum, compreendendo 15%-20% de todas as neoplasias intracranianas na infância. Além disso, 5%-6% dos meduloblastomas primários ou recorrentes podem estar associados à hemorragia espontânea e rápida deterioração. A hemorragia cursa com aumento de volume do tumor, extravasamento para o sistema ventricular através da cápsula tumoral, aumento da pressão intracraniana e herniação transtentorial ascendente. Hemorragia tumoral associada à drenagem ventricular, para tratamento de hidrocefalia em portadores de meduloblastoma, representa um fenômeno extremamente raro. A terceiroventriculostomia endoscópica (TVE) é reconhecida por ser bastante útil no tratamento da hipertensão intracraniana no pré-operatório e por prevenir a hidrocefalia persistente pós-operatória nos casos associados a tumores de fossa posterior, com eficácia superior às derivações ventriculares tradicionais. Descrevemos um caso de hemorragia tumoral e herniação transtentorial ascendente associados a terceiro-ventriculostomia endoscópica (TVE).

A rare case of third ventricular epidermoid cyst as seen by newer MRI sequences.

Aim: We describe a 52 year old gentleman who had a third ventricular lesion, presumed to be epidermoid cyst, which is very rare. We also describe the appearances of this rare condition on newer MRI sequences. Presentation of Case: Third ventricle is a rare site of epidermoid cysts and difficult to visualise specially in routine MRI sequences. We used 3D FLAIR sequence as part of routine MRI protocol that was helpful in raising suspicion initially, aided by clinical presentation. Subsequent 3D T2 SPACE sequence confirmed the presence of abnormality. Discussion: The case highlights the importance of high resolution 3D FLAIR sequence as part of initial MRI protocol that is devoid of CSF flow artefacts and therefore helpful for small intraventricular lesions. Importance of 3D T2 SPACE is also highlighted which is another new MRI sequence. It has excellent spatial resolution without artefacts that is helpful in clearly delineating the presence of small lesions such as epidermoid cyst and its relationship with surrounding structures and increasing diagnostic certainty. Conclusion: We present a rare case of presumed third ventricular epidermoid cyst and potential role of newer MRI sequences in small intraventricular lesions.

Quiste coloide del tercer ventrículo en un niño. A propósito de un caso / Colloid cyst. Report of a case in a child

Los quistes coloides son lesiones congénitas e infrecuentes, con una frecuencia del 0,2 al 2 % de todos lo tumores intracraneales. Se presentan en adultos jóvenes y tiene predominio en varones. Normalmente esféricos u ovoides, tienen un tamaño que varía desde pocos milímetros hasta tres o cuatro centímetros de diámetro. Comienzan a ser sintomáticos en la adolescencia o edad adulta temprana. Las manifestaciones clínicas pueden ser intermitentes y poco específicas. Deben ser considerados entre los diagnósticos diferenciales de cefalea en niños y adultos jóvenes, puede ser causa temprana de hidrocefalia aguda y síntomas neurológicos inespecíficos. El tratamiento recomendado es su extirpación quirúrgica temprana. Se presenta este caso por su presentación ocasional y extraordinaria en edad pediátrica.

The colloid cysts are infrequent congenital lesions of the brain. They are more frequent in adolescent and young adults, who present different clinical manifestation. The shape and size is variable. They should be considered in adolescent and young adults, it is common the early and acute presentation of hydrocephaly. We describe this case, because the unusual presentation in a child. The recommended treatment is the early surgical removal of the cyst.

Resonancia magnética de alta definiciónde lesiones intracraneales de la línea media: estudio descriptivo de nueve casos / High-resolution magnetic resonance imaging of midline intracranial lesions: a descriptive study of nine cases

Introducción: La técnica secuencia gradiente de eco tridimensional de campo rápido equilibrado en estado estacionario (3D b-FFE T2) permite visualizar la anatomía cerebral con mayor detalle que las secuencias convencionales para el estudio de la hidrocefalia, la afectación del III y IV ventrículo, el acueducto cerebral y otras estructuras de la línea media. Objetivo: Describir los hallazgos imaginológicos por resonancia magnética de la anatomía y algunas lesiones intracraneales de la línea media, utilizando secuencias 3D b-FFE T2. Materiales y métodos: Se desarrolló un estudio descriptivo de series de casos de nueve individuos de diferentes edades de la ciudad de Medellín, Colombia, en los que se evaluaron alteraciones de la línea media utilizando la técnica 3D b-FFE T2 durante el 2014. Resultados: Se seleccionaron cuatro casos con análisis del III ventrículo, el acueducto, las cisternas basales y sus contenidos por las secuencias convencionales de espín eco o turbo espín eco T1 y T2, y la técnica 3D b-FFE T2. Además, se incluyeron tres casos de hidrocefalia obstructiva, un caso con ventriculostomía, uno con hidrocefalia comunicante y dos con malformaciones vasculares cerebrales evaluados con la técnica 3D b-FFE T2. En todos los casos la secuencia 3D b-FFE T2 mostró en detalle las estructuras y lesiones de la línea media. Conclusiones: La secuencia 3D b-FFE T2 es de utilidad en el planeamiento prequirúrgico y en el seguimiento de la neuroendoscopía o de la ventriculostomía endoscópica del tercer ventrículo. Además, permite visualizar las estructuras y lesiones de la línea media con gran detalle.

Introduction: The three-dimensional balanced fast field echo (3D b-FFE T2) technique provides the visualization of cerebral anatomy with more detail than conventional techniques for the study of hydrocephalus,III and IV ventricular pathology, cerebral aqueduct and other midline brain structures. Objective:To describe imaginological findings by magnetic resonance of anatomy and some intracranial lesions of midline using 3D b-FFE T2 sequences. Materials and methods: A descriptive case series was developed on nine individuals of different age groups from Medellin, Colombia, in which the midlinepathology was evaluated through the 3D b-FFE T2 technique during 2014. Results: Four patients with analysis by conventional T1 and T2 spin echo or turbo spin echo and 3D b-FFE T2 techniques of the III ventricle, cerebral aqueduct, basal cisterns and their content were selected. In addition, three casesof obstructive hydrocephalus, a case with ventriculostomy, one with communicating hydrocephalus and two cases of cerebral vascular malformations evaluated with 3D b-FFE T2 technique were included.In all cases, the 3D b-FFE T2 sequence showed in details the structures and intracranial lesions of the midline. Conclusions: The 3D b-FFE T2 sequence is useful to preoperative planning and follow-up of the neuroendoscopic procedures or endoscopic ventriculostomy of the third ventricle. In addition, it permits to visualize the structures and lesions of midline with detail.

Endoscopic third ventriculostomy may have long term efficacy in low birth weight preterm newborns / Terceiro-ventriculostomia endoscópica pode ter eficácia em longo prazo em pacientes pré-termos e de baixo peso

Endoscopic third ventriculostomy (ETV) is an established treatment for hydrocephalus and is an alternative method avoiding shunts and its complications. There is still controversy regarding the higher risk of failure in younger infants. NARF was a male preterm newborn of 33 weeks old, with Moebius syndrome and 1,800 grams at birth. Detailed neonatal evaluation revealed hydrocephalus with bilateral ventricular index of 0.6. It was then decided, in spite of prematurity and low birth weight to perform ETV with the age of 25 days, with 1,850 grams. After discharge, follow-up was lost due to family moving to another city. By chance, after seven years child returned to our medical facility and a follow-up magnetic resonance revealed pervious ETV with high flow, demonstrating functionality of ventriculostomy. Patient?s age and etiology of hydrocephalus are the most important factors influencing the success rate of ETV. Recently, the age between 6 months and 1 year old became a cutoff below which failure rates are reported to be particularly high and there are dichotomized experience. The results in low birth weight and preterm infants is not widely known and can be poor. Our case illustrates a successful ETV in a both preterm and low birth weight newborn and a satisfactory long term result, reinforcing the security and efficacy of ETV even in newborns...

A terceiro-ventriculostomia endoscópica (TV) é um tratamento estabelecido para hidrocefalia e é um método alternativo para evitar próteses e suas complicações. Ainda há controvérsia a respeito de seu uso e falha em crianças menores. NARF foi um pré-termo nascido com 33 semanas de gestação, apresentava síndrome de Moebius e 1.800 gramas ao nascer. Avaliação neonatal detalhada revelou hidrocefalia com índice ventricular bilateral de 0,6. Foi submetido à TV com 25 dias de vida e 1.850 gramas. Após alta hospitalar, o seguimento foi perdido, pois a família se mudou de cidade. Após sete anos, a criança retornou ao hospital para tratamento de pneumonia, e a ressonância magnética de controle demonstrou trajeto endoscópico pérvio e com alto fluxo. A idade do paciente e a causa da hidrocefalia são os fatores mais importantes na taxa de sucesso da TV. Recentemente, vários casos vêm sendo publicados de crianças com menos de 1 ano. Os resultados em crianças pré-termo e de baixo peso ainda são desconhecidos. Nosso caso ilustra uma TV com trajeto pérvio sete anos após a cirurgia, denotando bom status em longo prazo...

Supratentorial primary neuroectodermal tumor (PNET) inside the third ventricle in adult: an rare case report / Tumor neuroectodérmico primário (PNET) supratentorial no terceiro ventrículo em adulto: um raro relato de caso

The PNET of CNS are considered malignant undifferentiated tumors, and it represents about 2,8% of all tumors found on infants and teenagers, more rarely found on adults. In the present article will report the case of a patient, male, 23 years-old, with nodular lesion inside the third ventricle, admitted on emergency room with acute intense headache, drowsiness, vomiting and visual clouding, started three days before. Although there have been advances in diagnosis and treatment of PNET in children, few publications were found on the efficiency of available treatment options on adults. In our patient the lesion was completely removed by a anterosuperior interhemispheric transcallosal craniotomy, and subsequently diagnosed as PNET by anatomopathological. Postoperative hydrocephaly was installed and reverted with a ventriculoperitoneal shunt, with clinical and neurological status improvement. The patient died 18 months after diagnosis, due to respiratory hospitalar infection...

Os PNET do SNC são considerados tumores malignos indiferenciados e representam cerca de 2,8% de todos os tumores encontrados em crianças e adolescentes, sendo mais raramente encontrados em adultos. Neste presente artigo, relatamos o caso de um paciente, do sexo masculino, com 23 anos de idade, com lesão nodular dentro do terceiro ventrículo, que foi admitido na emergência com cefaleia intensa e aguda, sonolência, vômitos e turvação visual, iniciados três dias antes da admissão. Embora tenha havido avanços no diagnóstico e tratamento de PNET em crianças, poucas publicações foram encontradas sobre a eficiência de opções de tratamento disponíveis em adultos. No nosso paciente a lesão foi completamente removida por uma craniotomia ântero-transcalosa inter-hemisférica; posteriormente, ele foi diagnosticado como PNET por meio do exame anatomopatológico. A hidrocefalia instalada no pós-operatório foi revertida com uma derivação ventrículo-peritoneal, com melhora do quadro clínico e neurológico. O paciente morreu 18 meses após o diagnóstico, em decorrência de uma infecção hospitalar respiratória...

Glioma cordoide do terceiro ventrículo: descrição de um novo caso / Chordoid glioma of the third ventricle: a new case report

O glioma cordoide é um tumor cerebral raro, recentemente descrito, localizado na região do terceiro ventrículo e com características histológicas, imuno-histoquímicas e ultraestruturais peculiares. Este estudo ilustra um caso de glioma cordoide do terceiro ventrículo em uma paciente de 59 anos de idade.

Chordoid glioma is a recently described and rare brain tumor located in the third ventricular region, with distinctive histological, immunohistochemical and ultrastructural features. The present report describes a case of chordoid glioma of the third ventricle in a 59-year-old female patient.