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https://www.readbyqxmd.com/read/28294345/long-term-mri-surveillance-after-microsurgery-for-vestibular-schwannoma
#1
Mia E Miller, Harrison Lin, Bill Mastrodimos, Roberto A Cueva
OBJECTIVES: To determine the optimal postoperative magnetic resonance imaging (MRI) schedule and length of follow-up for patients undergoing microsurgical excision of vestibular schwannoma (VS). STUDY DESIGN: A retrospective review of patients who underwent microsurgical excision of VS at a single tertiary care center between January 1993 and March 2004. METHODS: Two hundred and twenty subjects were analyzed and characteristics gathered, including tumor size, surgical approach, completeness of resection, and length of follow-up to last MRI...
March 14, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28283837/vascular-hyperpermeability-as-a-hallmark-of-phacomatoses-is-the-etiology-angiogenesis-related-to-or-comparable-with-mechanisms-seen-in-inflammatory-pathways-part-ii-angiogenesis-and-inflammation-related-molecular-pathways-tumor-associated-macrophages-and-possible
#2
REVIEW
Yosef Laviv, Burkhard Kasper, Ekkehard M Kasper
Phacomatoses are a special group of familial hamartomatous syndromes with unique neurocutaneous manifestations as well as characteristic tumors. Neurofibromatosis type 2 (NF2) and tuberous sclerosis complex (TSC) are representatives of this family. A vestibular schwannoma (VS) and subependymal giant cell tumor (SGCT) are two of the most common intracranial tumors associated with these syndromes, related to NF2 and TSC, respectively. These tumors can present with an obstructive hydrocephalus due to their location adjacent to or in the ventricles...
March 11, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28265819/vascular-hyperpermeability-as-a-hallmark-of-phacomatoses-is-the-etiology-angiogenesis-comparable-with-mechanisms-seen-in-inflammatory-pathways-part-i-historical-observations-and-clinical-perspectives-on-the-etiology-of-increased-csf-protein-levels-csf-clotting
#3
REVIEW
Yosef Laviv, Burkhard S Kasper, Ekkehard M Kasper
Phacomatoses are a special group of familial hamartomatous syndromes with unique neuro-cutaneous manifestations as well as disease characteristic tumors. Neurofibromatosis 2 (NF2) and tuberous sclerosis complex (TSC) are representatives of this family. Vestibular schwannoma (VS) and subependymal giant cell tumor (SGCT) are two of the most common intracranial tumors associated with NF2 and TSC, respectively. These tumors can present with obstructive hydrocephalus due to their location adjacent to or in the ventricles...
March 7, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28259295/risk-assessment-in-paediatric-glioma-time-to-move-on-from-the-binary-classification
#4
REVIEW
A J Dodgshun, J R Hansford, M J Sullivan
BACKGROUND: Paediatric glioma encompasses a wide range of entities with highly variable prognoses. Gliomas are grouped by histopathological features into high- and low-grade glioma but this classification until recently has not taken into account many emerging risk factors in this disease. A comprehensive risk classification has not been published for paediatric glioma despite many risk factors being established in this disease. METHODS: A comprehensive literature review was carried out identifying risk factors for paediatric low-grade and high-grade glioma...
March 2017: Critical Reviews in Oncology/hematology
https://www.readbyqxmd.com/read/28257299/optic-pathway-glioma-of-childhood
#5
Nailyn Rasool, Jeffrey G Odel, Michael Kazim
PURPOSE OF REVIEW: Optic pathway gliomas (OPG) are the most common tumor of the anterior visual pathway and can involve the optic nerve, chiasm, tract, and optic radiations. They are typically benign lesions, often pilocytic astrocytomas, which are diagnosed in childhood. We review the epidemiology, clinical presentation, diagnosis, and management of these lesions in patients with and without neurofibromatosis type 1 (NF-1). RECENT FINDINGS: Most commonly, patients diagnosed with OPG have NF-1 especially if the lesions are bilateral...
March 2, 2017: Current Opinion in Ophthalmology
https://www.readbyqxmd.com/read/28250774/a-giant-lumbar-pseudomeningocele-in-a-patient-with-neurofibromatosis-type-1-a-case-report
#6
Mauro Dobran, Maurizio Iacoangeli, Paolo Ruscelli, Martina Della Costanza, Davide Nasi, Massimo Scerrati
This is a rare case of giant lumbar pseudomeningocele with intra-abdominal extension in patient with neurofibromatosis type 1 (NF1). The patient's clinical course is retrospectively reviewed. A 34-year-old female affected by NF1 was referred to our institution for persistent low back pain and MRI diagnosis of pseudomeningocele located at L3 level with paravertebral extension. From the first surgical procedure by a posterior approach until the relapse of the pseudomeningocele documented by MRI, the patient underwent two subsequent posterior surgical procedures to repair the dural sac defect with fat graft and fibrin glue...
2017: Case Reports in Medicine
https://www.readbyqxmd.com/read/28217154/paediatric-calcified-intramedullary-schwannoma-at-conus-a-common-tumor-in-a-vicarious-location
#7
Aniruddha Tekkatte Jagannatha, Krishna Chaitanya Joshi, Shilpa Rao, Umesh Srikantha, Ravi Gopal Varma, Anita Mahadevan
Spinal schwannomas are commonly intradural extramedullary in location. As Schwann cells are not common in the central nervous system, intramedullary schwannomas are a rare entity. In adults, an estimated sixty cases have been reported in English literature. They are rarer in children (less than ten cases), and preoperative diagnosis becomes a prerogative in achieving total excision. Cervical cord is a common location and less commonly they occur in the conus. We report a rare case of calcified conus intramedullary schwannoma in a child without neurofibromatosis, who presented with conus-cauda syndrome of 1-year duration...
October 2016: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/28217149/congenital-extra-calvarial-plexiform-neurofibroma-in-occipito-cervical-region-with-occipital-bone-defect-with-neurofibromatosis-type-1-and-segmental-neurofibromatosis-case-report-and-review-of-literature
#8
REVIEW
Vivek Kumar Kankane, Gaurav Jaiswal, Tarun Kumar Gupta
Plexiform neurofibroma (PNF) of the scalp is an extremely rare lesion reported in association with neurofibromatosis (NF). Occipital location of PNF is even more infrequent; we reported one pediatric case of PNF in occipito-cervical region with multiple small occipital bone defects and associated with NF-1.
October 2016: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/28162254/medical-treatment-in-neurofibromatosis-type-2-review-of-the-literature-and-presentation-of-clinical-reports
#9
S Goutagny, M Kalamarides
The understanding of the molecular pathways underlying tumor development in neurofibromatosis type 2 (NF2) is increasing. Thus, repositioning drugs, drug therapies that are already clinically available for various cancers, appear potentially promising for NF2 patients. Based on preclinical data from in vitro or animal models, five different treatments have been proposed for selected NF2 cases. Evaluation of bevacizumab, a monoclonal antibody against VEGF has mainly been reported in retrospective studies; it has been reported to induce hearing improvement and tumor shrinkage in more than 50% of progressive vestibular schwannomas (VS)...
February 2, 2017: Neuro-Chirurgie
https://www.readbyqxmd.com/read/28135565/dissecting-clinical-heterogeneity-in-neurofibromatosis-type-1
#10
Courtney L Monroe, Sonika Dahiya, David H Gutmann
Neurofibromatosis type 1 (NF1) is a common neurogenetic disorder in which affected children and adults are predisposed to the development of benign and malignant nervous system tumors. Caused by a germline mutation in the NF1 tumor suppressor gene, individuals with NF1 are prone to optic gliomas, malignant gliomas, neurofibromas, and malignant peripheral nerve sheath tumors, as well as behavioral, cognitive, motor, bone, cardiac, and pigmentary abnormalities. Although NF1 is a classic monogenic syndrome, the clinical features of the disorder and their impact on patient morbidity are variable, even within individuals who bear the same germline NF1 gene mutation...
January 24, 2017: Annual Review of Pathology
https://www.readbyqxmd.com/read/28134730/primary-cutaneous-follicular-helper-t-cell-lymphoma-in-a-patient-with-neurofibromatosis-type-1-case-report-and-review-of-the-literature
#11
REVIEW
Anastasia Shamsuyarova, Zaid Kamil, Jan Delabie, Nadya Al-Faraidy, Danny Ghazarian
Patients with neurofibromatosis type 1 (NF-1) have a well-known predisposition for certain types of malignancies, including lymphoproliferative disorders. Cutaneous T-cell lymphoma (CTCL) has been reported in patients with NF-1, although it is considered a rare entity in this subset of patients. Cutaneous follicular helper T-cell lymphoma (CTFHCL) is a recently emerged rare subtype of CTCL with peculiar clinical and histopathological features and represents a diagnostic and therapeutic challenge. Only a few cases of CTFHCL have been reported in the literature...
February 2017: American Journal of Dermatopathology
https://www.readbyqxmd.com/read/28128429/-neurofibromatosis-type-2-in-childhood-a-clinical-characterization
#12
C M Hinojosa-Mateo, J A Reche-Sainz, A Hernandez-Nunez, M Ramos-Lopez, A Arpa-Fernandez, D Natera-de Benito
INTRODUCTION: Neurofibromatosis type 2 (NF2) is a dominantly inherited neuroectodermal syndrome that predispose to the development of tumors of the central and peripheral nervous system. Additional features include eye and skin abnormalities. CASE REPORT: A 12-year old male with diagnosis of MF2 according to Baser et al and presentation in childhood was included. A comprehensive bibliographic review of evolution of the diagnostic criteria for NF2 in children was performed...
February 1, 2017: Revista de Neurologia
https://www.readbyqxmd.com/read/28123914/bevacizumab-for-treatment-refractory-pain-control-in-neurofibromatosis-patients
#13
Xu W Linda, Lawrence D Recht
Chronic pain is a well-known morbidity associated with neurofibromatosis (NF) for which better therapies are needed. Surgery, radiation, and pain medications have been utilized, but often fail to relieve debilitating pain. One patient at our institution was noted to have near complete resolution of pain after treatment with bevacizumab for progressive neurologic deficit associated with NF2, suggesting its potential as an effective pain control method. We aim to better characterize the use of bevacizumab for pain control in this subset of patients...
December 18, 2016: Curēus
https://www.readbyqxmd.com/read/28111791/association-between-juvenile-myelomonocytic-leukemia-juvenile-xanthogranulomas-and-neurofibromatosis-type-1-case-report-and-review-of-the-literature
#14
REVIEW
Samuel Paulus, Sandra Koronowska, Regina Fölster-Holst
The occurrence of juvenile myelomonocytic leukemia (JMML), juvenile xanthogranuloma (JXG), and neurofibromatosis type 1 (NF1) together is relatively rare. Approximately only 20 cases have been reported in the literature. It is debated whether children with NF1 and JXG are at higher risk of developing JMML than children with NF1 alone. We present the case of a boy primarily diagnosed with NF1 with coexisting JXG who developed JMML at the age of 22 months. The clinical course from initial presentation to final diagnosis is detailed and the genetic features and hematologic characteristics are discussed...
March 2017: Pediatric Dermatology
https://www.readbyqxmd.com/read/28098509/-compassionate-use-protocol-for-auditory-brainstem-implantation-in-neurofibromatosis-type-2-early-house-ear-institute-experience
#15
Daniel S Roberts, William H Slattery, Brian S Chen, Steve R Otto, Marc S Schwartz, Gregory P Lekovic
OBJECTIVE: To report the preliminary outcomes of auditory brainstem implantation (ABI) under a compassionate use protocol for two ABI devices that are not approved by the US Food and Drug Administration. METHODS: A retrospective review was performed of neurofibromatosis type 2 (NF2) patients who underwent microsurgery for vestibular schwannoma (VS) and placement of either the Cochlear ABI541 or Med-El Synchrony ABIs. Peri-operative and device- related complications were reviewed...
January 18, 2017: Cochlear Implants International
https://www.readbyqxmd.com/read/28078640/development-of-the-pediatric-quality-of-life-inventory-neurofibromatosis-type-1-module-items-for-children-adolescents-and-young-adults-qualitative-methods
#16
Kavitha Nutakki, James W Varni, Sheila Steinbrenner, Claire B Draucker, Nancy L Swigonski
Health-related quality of life (HRQOL) is arguably one of the most important measures in evaluating effectiveness of clinical treatments. At present, there is no disease-specific outcome measure to assess the HRQOL of children, adolescents and young adults with Neurofibromatosis Type 1 (NF1). This study aimed to develop the items and support the content validity for the Pediatric Quality of Life Inventory™ (PedsQL™) NF1 Module for children, adolescents and young adults. The iterative process included multiphase qualitative methods including a literature review, survey of expert opinions, semi-structured interviews, cognitive interviews and pilot testing...
January 11, 2017: Journal of Neuro-oncology
https://www.readbyqxmd.com/read/28067895/the-nf1-gene-in-tumor-syndromes-and-melanoma
#17
Maija Kiuru, Klaus J Busam
Activation of the RAS/MAPK pathway is critical in melanoma. Melanoma can be grouped into four molecular subtypes based on their main genetic driver: BRAF-mutant, NRAS-mutant, NF1-mutant, and triple wild-type tumors. The NF1 protein, neurofibromin 1, negatively regulates RAS proteins through GTPase activity. Germline mutations in NF1 cause neurofibromatosis type I, a common genetic tumor syndrome caused by dysregulation of the RAS/MAPK pathway, ie, RASopathy. Melanomas with NF1 mutations typically occur on chronically sun-exposed skin or in older individuals, show a high mutation burden, and are wild-type for BRAF and NRAS...
February 2017: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/28052660/outcomes-of-treatment-for-malignant-peripheral-nerve-sheath-tumors-different-clinical-features-associated-with-neurofibromatosis-type-1
#18
In Kyung Hwang, Seung Min Hahn, Hyo Sun Kim, Sang Kyum Kim, Hyo Song Kim, Kyoo-Ho Shin, Chang Ok Suh, Chuhl Joo Lyu, Jung Woo Han
Purpose: Malignant peripheral nerve sheath tumors (MPNSTs) are a rare subtype of sarcoma that occur spontaneously or in association with neurofibromatosis type 1 (NF-1). This study aimed to clinically differentiate these types of MPNSTs. Materials and Methods: The study reviewed 95 patients diagnosed with and treated for MPNST at Yonsei University Health System, Seoul, Korea over a 27-year period. The clinical characteristics, prognostic factors, and treatment outcomes of sporadic (sMPNST) and NF-1 associated MPNST (NF-MPNST) cases were compared...
December 1, 2016: Cancer Research and Treatment: Official Journal of Korean Cancer Association
https://www.readbyqxmd.com/read/28001089/the-role-of-the-immune-system-in-neurofibromatosis-type-1-associated-nervous-system-tumors
#19
Souvik Karmakar, Karlyne M Reilly
With the recent development of new anticancer therapies targeting the immune system, it is important to understand which immune cell types and cytokines play critical roles in suppressing or promoting tumorigenesis. The role of mast cells in promoting neurofibroma growth in neurofibromatosis type 1 (NF1) patients was hypothesized decades ago. More recent experiments in mouse models have demonstrated the causal role of mast cells in neurofibroma development and of microglia in optic pathway glioma development...
December 21, 2016: CNS Oncology
https://www.readbyqxmd.com/read/27999927/incidence-and-risk-factors-for-the-misplacement-of-pedicle-screws-in-scoliosis-surgery-assisted-by-o-arm-navigation-analysis-of-a-large-series-of-one-thousand-one-hundred-and-forty-five-screws
#20
Mengran Jin, Zhen Liu, Yong Qiu, Huang Yan, Xiao Han, Zezhang Zhu
PURPOSE: To assess the accuracy of O-arm-navigation-based pedicle screw placement in scoliosis surgery and identify the potential risk factors for the misplacement of pedicle screws. METHODS: One hundred forty four scoliosis patients treated with O-arm-navigation-based pedicle screw instrumentation were enrolled, and 1145 pedicle screws implanted in the apical region of the curves were retrospectively reviewed for accuracy according to post-operative CT images. The potential risk factors and independent predictive factor(s) for the misplaced screws were identified statistically...
December 21, 2016: International Orthopaedics
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