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pediatric cerebellopontine angle lesions

D Mata-Mbemba, M Zapotocky, S Laughlin, M D Taylor, V Ramaswamy, C Raybaud
BACKGROUND AND PURPOSE: Molecular grouping of medulloblastoma correlates with prognosis and supports the therapeutic strategy. We provide our experience with the imaging features of primary and metastatic disease in relation to the molecular groups. MATERIALS AND METHODS: One hundred nineteen consecutive patients (mean age, 7.3 ± 3.8 years at diagnosis; male, 79 [66.4%]) with a confirmed diagnosis of medulloblastoma and interpretable pretreatment MRIs were retrieved from our data base from January 2000 to December 2016...
May 2018: AJNR. American Journal of Neuroradiology
Ahmet Öğrenci, Osman Ersegun Batçık, Murat Şakir Ekşi, Orkun Koban
BACKGROUND: Langerhans cell histiocytosis (LCH) is a disorder of immature LCH cells, eosinophils, macrophages, lymphocytes, and multinucleated giant cells. Eosinophilic granuloma (EG) is a focal form of LCH that presents mostly in the skull, femur, vertebrae, pelvis, mandible, and ribs. Intracranial presentation of EG is very rare in the literature. CASE DESCRIPTION: A 17-year-old boy visited our clinic with headache, dizziness, and tinnitus that were present for 2 months...
August 2016: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
G Lakshmi Prasad, Ashok Kumar Mahapatra
BACKGROUND: Choroid plexus papillomas (CPPs) comprise around 1% of intracranial neoplasms. The most common location is atrium of the lateral ventricle in children and fourth ventricle in adults. Other rare locations include third ventricle, cerebellopontine (CP) angle and cerebral parenchyma, with only a few cases reported. Authors report three cases of CPP at uncommon locations in pediatric patients. The rarity of these locations, diagnostic dilemma and management aspects are discussed along with an extensive review of the literature...
2015: Surgical Neurology International
Z Patay, L A DeSain, S N Hwang, A Coan, Y Li, D W Ellison
BACKGROUND AND PURPOSE: "Transcriptionally different" medulloblastoma groups are associated with specific signaling pathway abnormalities; hence, they may present with distinct imaging manifestations. In this study, we sought to describe the MR imaging features of wingless-type-subgroup medulloblastomas with embryologic correlations. MATERIALS AND METHODS: Pre- and postoperative imaging studies of 16 patients with wingless-type-subgroup medulloblastoma were evaluated for tumor location, involvement of surrounding CSF spaces or parenchymal structures, conventional and DWI signal properties, and postsurgical damage patterns...
December 2015: AJNR. American Journal of Neuroradiology
Michelle A Holman, William R Schmitt, Matthew L Carlson, Colin L W Driscoll, Charles W Beatty, Michael J Link
OBJECT: The aim in this study was to describe the clinical presentation, differential diagnosis, and risk for neurofibromatosis Type 2 (NF2) in pediatric patients presenting with cerebellopontine angle (CPA) and internal auditory canal (IAC) tumors. METHODS: The authors conducted a retrospective study at a tertiary care academic referral center. All patients with an age ≤ 18 years who had presented with an extraaxial CPA or IAC tumor between 1987 and 2012 were included in the study cohort...
October 2013: Journal of Neurosurgery. Pediatrics
Smruti K Patel, James K Liu
Neurenteric cysts are rare and benign lesions that consist of ectopic alimentary tissue residing in the central nervous system. They tend to occur most frequently in an intraspinal rather than intracranial location. Intracranial neurenteric cysts are a rare occurrence in the pediatric population. These lesions typically present as unilateral cystic structures in the lower cerebellopontine angle and craniocervical junction. To the authors' knowledge, there have been no reported cases of bilateral localization of intracranial neurenteric cysts...
September 2013: Journal of Neurosurgery. Pediatrics
Ibrahim H Al-Ahmed, Mohamed Boughamoura, Peter Dirks, Abhaya V Kulkarni, James T Rutka, James M Drake
OBJECT: Neurenteric cysts (NCs) are endothelium-lined structures of presumed endodermal origin. There have been few pediatric series of intracranial NCs reported previously. The authors present their experience in the management of these lesions. METHODS: A retrospective chart review of all cases of NCs identified between 1977 and 2007 was carried out. Demographics, details of clinical presentation, surgical therapy, and outcome data were extracted. RESULTS: Eleven cases were identified, involving 6 girls and 5 boys...
May 2013: Journal of Neurosurgery. Pediatrics
Ji Hoon Phi, Kyu-Chang Wang, In-One Kim, Jung-Eun Cheon, Jung Won Choi, Byung-Kyu Cho, Seung-Ki Kim
Cerebellopontine angle (CPA) tumors are uncommon in children, and the pathological spectrum is different from that of adults. In this study, we reviewed the pathological diagnosis of pediatric patients with a CPA tumor to determine the pattern in this age group. In a cohort of 267 patients with posterior fossa tumor, tumor locations were determined with preoperative magnetic resonance imaging (MRI). The pathological diagnosis, imaging characteristic, and treatment outcomes of patients with CPA tumors was reviewed and analyzed...
May 2013: Journal of Neuro-oncology
Ricardo Santos de Oliveira, Werllen Soares Maia, Marcelo Volpon Santos, Ródio Luis Brandão Camara
OBJECTIVE: Epidermoid cysts of the cerebellopontine angle (CPA) can be a surgical challenge for the pediatric neurosurgeon. Ideally, total removal must be achieved; however, occasional adhesions of these tumors to vital neurovascular structures and extension far beyond the midline may preclude their total removal. The aims of this article are to present an alternative surgical approach to these lesions and to provide the rationale for this technique. MATERIAL AND METHODS: A 16-year-old boy was admitted to our pediatric neurosurgery department with a 1-year history of nonspecific headaches...
December 2012: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
Marcelo R Masruha, Libânia M N Fialho, Marcel V da Nóbrega, Jaime Lin, Ricardo S Pinho, Sérgio Cavalheiro, Luiz Celso P Vilanova
Hemifacial spasm is a disorder of the seventh cranial nerve, which is characterized by irregular, involuntary and recurrent tonic and clonic contractions of the ipsilateral facial expression muscles. This disorder affects mainly adults, and there are few cases reported in childhood. The main etiologies are vascular problems, although tumors are an important cause of hemifacial spasm via a direct or an indirect mass effect. We report a 6-year-old girl who presented with right hemifacial spasm. Magnetic resonance imaging showed a lesion in the cerebellopontine angle, extending from the midbrain to the pons with a slight mass effect on the fourth ventricle...
January 2011: Journal of Pediatric Neurosciences
Ibrahim Ahmed, Kurtis I Auguste, Shobhan Vachhrajani, Peter B Dirks, James M Drake, James T Rutka
OBJECT: Epidermoid tumors are benign lesions representing 1% of all intracranial tumors. There have been few pediatric series of intracranial epidermoid tumors reported previously. The authors present their experience in the management of these lesions. METHODS: The neurosurgical database at the Hospital for Sick Children was searched for children with surgically managed intracranial epidermoid tumors. The patients' charts were reviewed for demographic data, details of clinical presentation, surgical therapy, and follow-up...
August 2009: Journal of Neurosurgery. Pediatrics
Başar Atalay, Nur Altinörs, Cem Yilmaz, Alper Koçbiyik
A chloroma or granulocytic sarcoma is an extramedullary leukemia. It can be encountered at any anatomical location, but until now only three cases have been reported in the cerebellopontine angle. We present an 8-year old patient with an extraaxial chloroma of the cerebellopontine angle to highlight this very rare and malignant pathology in the differential diagnosis of cerebellopontine angle tumors. The presented case, being the fourth chloroma in the cerebellopontine angle, occurred in the absence of relapse which is very unusual for these lesions...
October 2007: Turkish Neurosurgery
Narayanam Anantha Sai Kiran, Ashish Suri, Manish Kumar Kasliwal, Anil Garg, Faiz Uddin Ahmad, Ashok Kumar Mahapatra
PURPOSE: Craniopharyngiomas with a large posterior fossa extension beyond the level of the foramen magnum are very rare and usually removed in two stages. The objective of this paper is to report that such rare cases of giant cystic predominantly retrochiasmatic retroclival craniopharyngiomas can be completely excised by an anterior transpetrous approach in a single stage. MATERIALS AND METHODS: The first case was a 6-year-old boy who presented with a 1-year history of recurrent episodes of seizures, headache, and vomiting...
March 2008: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
Ishita Pant, Sanjeev Chandra Joshi
OBJECTS: Intra-axial dermoid cysts are rare intracranial space occupying lesions, more so in the pediatric age group. Dermoid cysts account for about 0.2 to 1.8% of all intracranial tumors and are commonly located in the cisternal spaces, mainly in the cerebellopontine angle and parasellar cisterns. A purely intra-axial position as reported in this paper is quite exceptional. MATERIALS AND METHODS: We report a case of intra-axial dermoid cyst located in the cerebellum that was surgically treated...
January 2008: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
Graciela Zúccaro, Fidel Sosa
BACKGROUND: Cerebellopontine angle (CPA) lesions are more commonly found in adults in which they account for 5-10% of all intracranial tumors. However, they are uncommon in children, with an incidence of only 1%. MATERIALS AND METHODS: This is a review of the management of CPA lesions in children admitted to the Hospital Nacional de Pediatría "Profesor Doctor Juan P. Garrahan" (Argentine National Pediatrics Hospital "Professor Juan P. Garrahan") between January 1988 and December 2003...
February 2007: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
Isaac O Karikari, Lee A Selznick, Thomas J Cummings, Timothy M George
A 3-month-old boy presented to the pediatric neurosurgery service with central hypotonia. Magnetic resonance images of the brain revealed a homogeneously enhancing dumbbell-shaped mass located in the fourth ventricle and extending into the left cerebellopontine angle (CPA). A suboccipital craniotomy was performed and a gross-total resection of the mass was achieved. Pathological examination of the resected tissue confirmed the diagnosis of capillary hemangioma. To the authors' knowledge, this is the first reported case of a capillary hemangioma occurring in this location...
March 2006: Journal of Neurosurgery
M A T Ferreira, I Feiz-Erfan, J M Zabramski, R F Spetzler, S W Coons, M C Preul
Endolymphatic sac tumors (EST) are rare intracranial tumors originating from the pars rugosa of the endolymphatic sac. Although typically described as histologically nonaggressive lesions, nevertheless they are termed adenocarcinomas and often become locally invasive. We report two patients with histologically proven EST with unique clinical features: the first pediatric case of an EST in an 11-year-old patient whose complaints started at the age of seven; and, a second patient, a 43-year-old man, the first report of metastatic EST which appeared in a remote location from the original site of surgery...
October 2002: Acta Neurochirurgica
Francesco Sala, Matevz J Krzan, Vedran Deletis
INTRODUCTION: This review is primarily based on peer-reviewed scientific publications and on the authors' experience in the field of intraoperative neurophysiology. The purpose is a critical analysis of the role of intraoperative neurophysiological monitoring (INM) during various neurosurgical procedures, emphasizing the aspects that mainly concern the pediatric population. Original papers related to the field of intraoperative neurophysiology were collected using medline. INM consists in monitoring (continuous "on-line" assessment of the functional integrity of neural pathways) and mapping (functional identification and preservation of anatomically ambiguous nervous tissue) techniques...
July 2002: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
K Harada, T Nishizaki, N Adachi, M Suzuki, H Ito
Acoustic schwannoma is a slow-growing tumor and usually occurs in adult patients. We report a rare pediatric case of acoustic schwannoma with high proliferative potential. A 10-year-old boy was diagnosed as having a right cerebellopontine angle tumor. The tumor was subtotally resected. Histological examination revealed a typical acoustic schwannoma with a few mitotic figures. Chromosomal analysis showed no abnormality on the long arm of chromosome 22 associated with neurofibromatosis type 2. The lesion re-grew rapidly as an acoustic schwannoma, necessitating subtotal resection on three occasions and CyberKnife radiosurgery...
March 2000: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
C R Freeman, L Souhami, J L Caron, J G Villemure, A Olivier, J Montes, J P Farmer, E B Podgorsak
Stereotactically guided external beam irradiation may be a useful form of treatment for small, well-circumscribed, but surgically inaccessible, primary brain tumors that are either benign or of low malignant potential. Between March 1988 and December 1991, 10 children and adolescents with previously untreated primary brain tumors were treated with stereotactic external beam irradiation (SEBI) using a linac-based dynamic technique. Eleven lesions were treated in the 10 patients. Treatment was given using a collimator diameter of 1...
1994: Medical and Pediatric Oncology
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