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Bajin IY, Levine A, Dewan MC, Bennett J, Tabori U, Hawkins C, Bouffet E. Understanding diffuse leptomeningeal glioneuronal tumors. Childs Nerv Syst 2024; 40:2359-2366. [PMID: 38795167 DOI: 10.1007/s00381-024-06432-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/07/2024] [Accepted: 04/27/2024] [Indexed: 05/27/2024]
Abstract
INTODUCTION Diffuse leptomeningeal glioneuronal tumors (DLGNTs) pose a rare and challenging entity within pediatric central nervous system neoplasms. Despite their rarity, DLGNTs exhibit complex clinical presentations and unique molecular characteristics, necessitating a deeper understanding of their diagnostic and therapeutic nuances. METHODS This review synthesizes contemporary literature on DLGNT, encompassing epidemiology, clinical manifestations, pathological features, treatment strategies, prognostic markers, and future research directions. To compile the existing body of knowledge on DLGNT, a comprehensive search of relevant databases was conducted. RESULTS DLGNT primarily affects pediatric populations but can manifest across all age groups. Its diagnosis is confounded by nonspecific clinical presentations and overlapping radiological features with other CNS neoplasms. Magnetic resonance imaging (MRI) serves as a cornerstone for DLGNT diagnosis, revealing characteristic leptomeningeal enhancement and intraparenchymal involvement. Histologically, DLGNT presents with low to moderate cellularity and exhibits molecular alterations in the MAPK/ERK signalling pathway. Optimal management of DLGNT necessitates a multidisciplinary approach encompassing surgical resection, chemotherapy, radiotherapy, and emerging targeted therapies directed against specific genetic alterations. Prognostication remains challenging, with factors such as age at diagnosis, histological subtypes, and genetic alterations influencing disease progression and treatment response. Long-term survival data are limited, underscoring the need for collaborative research efforts. CONCLUSION Advancements in molecular profiling, targeted therapies, and international collaborations hold promise for improving DLGNT outcomes. Harnessing the collective expertise of clinicians, researchers, and patient advocates, can advance the field of DLGNT research and optimize patient care paradigms.
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Affiliation(s)
- Inci Yaman Bajin
- Division of Hematology/Oncology, The Hospital for Sick Children, Toronto, ONT, Canada.
| | - Adrian Levine
- Department of Pathology, The Hospital for Sick Children, Toronto, ONT, Canada
| | - Michael C Dewan
- Department of Neurological Surgery, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Julie Bennett
- Division of Hematology/Oncology, The Hospital for Sick Children, Toronto, ONT, Canada
- Division of Medical Oncology and Hematology, Princess Margaret Cancer Centre, Toronto, ONT, Canada
| | - Uri Tabori
- Division of Hematology/Oncology, The Hospital for Sick Children, Toronto, ONT, Canada
| | - Cynthia Hawkins
- Department of Pathology, The Hospital for Sick Children, Toronto, ONT, Canada
| | - Eric Bouffet
- Division of Hematology/Oncology, The Hospital for Sick Children, Toronto, ONT, Canada.
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Wiśniewski K, Brandel MG, Gonda DD, Crawford JR, Levy ML. Prognostic factors in diffuse leptomeningeal glioneuronal tumor (DLGNT): a systematic review. Childs Nerv Syst 2022; 38:1663-1673. [PMID: 35867118 DOI: 10.1007/s00381-022-05600-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 07/02/2022] [Indexed: 11/30/2022]
Abstract
BACKGROUND Diffuse leptomeningeal glioneuronal tumor (DLGNT) is a rare tumor, first described by the WHO Classification of Central Nervous System Tumors in 2016. The clinical course is variable. Most tumors have low-grade histological findings although some may have more aggressive features. The goal of this systematic review was to identify prognostic factors for poor overall survival (OS). MATERIAL AND METHODS We performed a systematic review using three databases (PubMed, Google Scholar, and Embase) and the following search terms: diffuse leptomeningeal glioneuronal tumor, DLGNT, DLMGNT. Statistical analysis was performed using Statistica 13.3. RESULTS We included 34 reports in our review comprising 63 patients, published from 2016 to 2022. The median OS was 19 months (range: 12-51 months). Using multivariable Cox survival analysis, we showed that Ki-67 ≥ 7%, age > 9 years, symptoms of elevated intracranial pressure (ICP) at admission, and the presence of contrast-enhancing intraparenchymal tumor are associated with poor OS. Receiver operating characteristic (ROC) analysis identified Ki-67 ≥ 7% as a significant predictor of poor OS. CONCLUSIONS Signs or symptoms of increased ICP with imaging findings of diffuse leptomeningeal enhancement should raise suspicion for DLGNT. In our systematic review, Ki-67 ≥ 7% was the most important prognostic factor for OS in DLGNT. The presence of intraparenchymal tumor with contrast enhancement was thought to represent disease progression and, together with patient age, was associated with poor OS.
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Affiliation(s)
- Karol Wiśniewski
- Department of Neurosurgery, University of California, San Diego-Rady Children's Hospital, San Diego, CA, 92123, USA. .,Department of Neurosurgery and Neurooncology, Medical University of Lodz, Barlicki University Hospital, Kopcińskiego 22, 90-153, Lodz, Poland.
| | - Michael G Brandel
- Department of Neurosurgery, University of California, San Diego-Rady Children's Hospital, San Diego, CA, 92123, USA
| | - David D Gonda
- Department of Neurosurgery, University of California, San Diego-Rady Children's Hospital, San Diego, CA, 92123, USA
| | - John R Crawford
- Neurosciences Institute and Division of Child Neurology, Children's Health of Orange County, Orange, CA, 92868, USA
| | - Michael L Levy
- Department of Neurosurgery, University of California, San Diego-Rady Children's Hospital, San Diego, CA, 92123, USA
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Diffuse leptomeningeal glioneuronal tumour (DLGNT) in children: the emerging role of genomic analysis. Acta Neuropathol Commun 2021; 9:147. [PMID: 34493325 PMCID: PMC8422739 DOI: 10.1186/s40478-021-01248-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 08/23/2021] [Indexed: 11/10/2022] Open
Abstract
Diffuse leptomeningeal glioneuronal tumours (DLGNT) represent rare enigmatic CNS tumours of childhood. Most patients with this disease share common radiological and histopathological features but the clinical course of this disease is variable. A radiological hallmark of this disease is widespread leptomeningeal enhancement that may involve the entire neuroaxis with predilection for the posterior fossa and spine. The classic pathologic features include low- to moderate-density cellular lesions with OLIG2 expression and evidence of ‘oligodendroglioma-like’ appearance. The MAPK/ERK signaling pathway has recently been reported as a potential driver of tumourigenesis in up to 80% of DLGNT with KIAA1549:BRAF fusions being the most common event seen. Until now, limited analysis of the biological drivers of tumourigenesis has been undertaken via targeted profiling, chromosomal analysis and immunohistochemistry. Our study represents the first examples of comprehensive genomic sequencing in DLGNT and shows that it is not only feasible but crucial to our understanding of this rare disease. Moreover, we demonstrate that DLGNT may be more genomically complex than single-event MAPK/ERK signaling pathway tumours.
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Diffuse leptomeningeal glioneuronal tumour: where to biopsy? Case report and literature review. Childs Nerv Syst 2021; 37:2405-2408. [PMID: 33128604 DOI: 10.1007/s00381-020-04955-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 10/28/2020] [Indexed: 10/23/2022]
Abstract
PURPOSE Diffuse leptomeningeal glioneuronal tumour (DLGT) is an infrequent entity. Diagnosis is made with biopsy but with so few cases described management, prognosis remains undefined. There are not currently any articles regarding most effective place to biopsy. METHODS Current literature review and introduction of the case of a 3-year-old male presenting at the emergency room with irritability, vomiting and nuchal rigidity. A head CT was made showing tetraventricular enlargement and a posterior fossa cyst. RESULTS Patient underwent urgent ventriculoperitoneal shunting surgery with complete symptomp resolution. Brain MRI showed diffuse leptomeningeal enhancing, predominantly in basal cisterns, and multiple cystic-solid lesions along the neural axis. After ruling other conditions, a biopsy among intraoperative samples, was obtained of a PET positive gadolinium spinal enhancing lesion at D8 level, with the final diagnosis of DLGT. CONCLUSION DLGT can present as acute hydrocephalus. Biopsy stablishes the diagnosis but the place to take the sample can be difficult to select. Our experience suggests that PET-CT and intraoperative biopsy analysis can improve the effectivity of a representative sample.
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Giron C, Paquette D, Culang D, Doré M, Masseau I. Diffuse meningeal oligodendrogliomatosis characterized by spinal intra-parenchymal nodules on magnetic resonance imaging in a dog. THE CANADIAN VETERINARY JOURNAL = LA REVUE VETERINAIRE CANADIENNE 2020; 61:1312-1318. [PMID: 33299250 PMCID: PMC7659878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Meningeal oligodendrogliomatosis is a relatively rare neoplasm in dogs. Ante-mortem diagnosis is difficult due to nonspecific neurologic signs overlapping other conditions. The only reported consistent feature is a high level of protein in the cerebrospinal fluid. Veterinary literature offers only 1 case report with magnetic resonance imaging (MRI) of canine spinal meningeal oligodendrogliomatosis in a single dog. In contrast to the predominant diffuse meningeal enhancement shown in that report, we present the case of a young female cane corso dog with marked nodular invasion of the spinal cord on MRI, confirmed by histopathology to be consistent with diffuse meningeal oligodendrogliomatosis. Key clinical message: Meningeal oligodendrogliomatosis should be a differential diagnosis when marked nodular invasion of the spinal cord is seen on MRI, both with and without meningeal enhancement.
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Affiliation(s)
- Céline Giron
- Département de Sciences Cliniques (Giron, Masseau), Département de Pathologie et Microbiologie (Culang, Doré), Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Quebec; Service de Neurologie, Centres Vétérinaires DMV, Montréal, Quebec (Paquette)
| | - Dominique Paquette
- Département de Sciences Cliniques (Giron, Masseau), Département de Pathologie et Microbiologie (Culang, Doré), Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Quebec; Service de Neurologie, Centres Vétérinaires DMV, Montréal, Quebec (Paquette)
| | - Déborah Culang
- Département de Sciences Cliniques (Giron, Masseau), Département de Pathologie et Microbiologie (Culang, Doré), Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Quebec; Service de Neurologie, Centres Vétérinaires DMV, Montréal, Quebec (Paquette)
| | - Monique Doré
- Département de Sciences Cliniques (Giron, Masseau), Département de Pathologie et Microbiologie (Culang, Doré), Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Quebec; Service de Neurologie, Centres Vétérinaires DMV, Montréal, Quebec (Paquette)
| | - Isabelle Masseau
- Département de Sciences Cliniques (Giron, Masseau), Département de Pathologie et Microbiologie (Culang, Doré), Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Quebec; Service de Neurologie, Centres Vétérinaires DMV, Montréal, Quebec (Paquette)
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Chen W, Kong Z, Fu J, Zhao D, Wang R, Ma W, Wang Y. Diffuse leptomeningeal glioneuronal tumour (DLGNT) with hydrocephalus as an initial symptom: a case-based update. Childs Nerv Syst 2020; 36:459-468. [PMID: 31897629 DOI: 10.1007/s00381-019-04481-w] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 12/17/2019] [Indexed: 12/20/2022]
Abstract
PURPOSE Diffuse leptomeningeal glioneuronal tumour (DLGNT) is a rare disease classified in 2016. There are different views of the clinical, pathologic and neuroradiologic characteristics of DLGNT due to the minor studies on this disease. METHODS We describe a case of a 12-year-old boy who initially presented intermittent headache, vomiting and communicating hydrocephalus. A literature review is also presented summarizing the clinical characteristics and treatments of DLGNT. RESULTS In our case, a ventriculoperitoneal shunt was applied to reduce intracranial pressure caused by communicating hydrocephalus. T1-weighted contrast-enhanced magnetic resonance imaging (MRI) showed linear enhancement, and microscopy showed tumour-like spindle cells. The diagnosis of DLGNT was confirmed, and temozolomide was administered. The clinical characteristics were similar in the reported cases, while the treatments showed differences. CONCLUSION Ventriculoperitoneal shunts are effective for patients with hydrocephalus-related intracranial hypertension. Chemotherapy including temozolomide has shown varying outcomes, and further studies are expected.
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Affiliation(s)
- Wenlin Chen
- Department of Neurosurgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan Wangfujing Dongcheng District, Beijing, China
| | - Ziren Kong
- Department of Neurosurgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan Wangfujing Dongcheng District, Beijing, China
| | - Ji Fu
- Department of Neurosurgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan Wangfujing Dongcheng District, Beijing, China
| | - Dachun Zhao
- Department of Pathology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan Wangfujing Dongcheng District, Beijing, China
| | - Renzhi Wang
- Department of Neurosurgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan Wangfujing Dongcheng District, Beijing, China
| | - Wenbin Ma
- Department of Neurosurgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan Wangfujing Dongcheng District, Beijing, China
| | - Yu Wang
- Department of Neurosurgery, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 1 Shuaifuyuan Wangfujing Dongcheng District, Beijing, China.
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