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Chen F, Xie X, Wang L. Research Progress on Intracranial Lymphatic Circulation and Its Involvement in Disorders. Front Neurol 2022; 13:865714. [PMID: 35359624 PMCID: PMC8963982 DOI: 10.3389/fneur.2022.865714] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Accepted: 02/14/2022] [Indexed: 12/14/2022] Open
Abstract
The lymphatic system is an important part of the circulatory system, as an auxiliary system of the vein, which has the functions of immune defense, maintaining the stability of the internal environment, and regulating the pressure of the tissue. It has long been thought that there are no typical lymphatic vessels consisting of endothelial cells in the central nervous system (CNS). In recent years, studies have confirmed the presence of lymphatic vessels lined with endothelial cells in the meninges. The periventricular meninges of the CNS host different populations of immune cells that affect the immune response associated with the CNS, and the continuous drainage of interstitial and cerebrospinal fluid produced in the CNS also proceeds mainly by the lymphatic system. This fluid process mobilizes to a large extent the transfer of antigens produced by the CNS to the meningeal immune cells and subsequently to the peripheral immune system through the lymphatic network, with clinically important implications for infectious diseases, autoimmunity, and tumor immunology. In our review, we discussed recent research advances in intracranial lymphatic circulation and the pathogenesis of its associated diseases, especially the discovery of meningeal lymphatic vessels, which has led to new therapeutic targets for the treatment of diseases associated with the intracranial lymphatic system.
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Affiliation(s)
- Fan Chen
- Department of Neurosurgery, Tangdu Hospital of Fourth Military Medical University, Xi'an, China
| | - Xuan Xie
- Department of Neurosurgery, Tangdu Hospital of Fourth Military Medical University, Xi'an, China
| | - Liang Wang
- Department of Neurosurgery, Tangdu Hospital of Fourth Military Medical University, Xi'an, China
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Gallego-Henao K, Ramos-Delgado JM, Moreno-Blanco A, Placido-Méndez A, Zarate-Mendez A. Extraventricular Neurocytoma in Parietal Lobe. INDIAN JOURNAL OF NEUROSURGERY 2021. [DOI: 10.1055/s-0041-1727546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
AbstractExtraventricular neurocytoma (EVN) was classified as a World Health Organization (WHO) grade II tumor; however, EVN is not fully understood; it presents a variable histological feature that included oligodendroglioma-like, neuropil-like matrix, ganglion or gangloid cells, perivascular pseudorosettes, vessel hyalinization, calcifications, and myxoid degeneration. In some very rare cases, atypical histological features such as increased mitotic figures, focal necrosis, endothelial cell proliferation, and Ki-67 index of >2% made this tumor more aggressive and more susceptible to recur. We present the case of a young patient who presents with a 2-year history of seizure without other symptoms. Magnetic resonance imaging reveals a parietal lobe and well-circumscribed lesion treated by gross total resection and adjuvant radiotherapy. Clear guidelines to treat this kind of lesions are not well established and there is not a consensus of correct treatment in these tumors.
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Affiliation(s)
- Katherine Gallego-Henao
- Department of Neurosurgery, Centro Médico Nacional “20 de Noviembre” Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado (ISSSTE), Mexico City, México
| | - José M. Ramos-Delgado
- Department of Neurosurgery, Centro Médico Nacional “20 de Noviembre” Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado (ISSSTE), Mexico City, México
| | - Angelica Moreno-Blanco
- Department of Pathology, Centro Medico Nacional “20 de Noviembre” Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado (ISSSTE), Mexico City, México
| | - Aureliano Placido-Méndez
- Department of Pathology, Centro Medico Nacional “20 de Noviembre” Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado (ISSSTE), Mexico City, México
| | - Antonio Zarate-Mendez
- Department of Neurosurgery, Centro Médico Nacional “20 de Noviembre” Instituto de Seguridad y Servicios Sociales de los Trabajadores del Estado (ISSSTE), Mexico City, México
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Gaggiotti C, Giammalva GR, Raimondi M, Florena AM, Gerardi RM, Graziano F, Tumbiolo S, Iacopino DG, Maugeri R. A rare diagnosis of an extraventricular neurocytoma. Surg Neurol Int 2021; 12:88. [PMID: 33767892 PMCID: PMC7982114 DOI: 10.25259/sni_951_2020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Accepted: 02/09/2021] [Indexed: 11/05/2022] Open
Abstract
Background: Extraventricular neurocytoma (EVN) is an extremely rare neoplasm of the central nervous system. As reported, it arises in a variety of locations, but mainly within the cerebral hemispheres. Despite its histological similarity with central neurocytoma (CN), EVN occurs outside the ventricular system and, in 2007, was recognized by the World Health Organization as a separate entity. Case Description: A 39-year-old man, with a ventriculoperitoneal shunt inserted for communicating hydrocephalus, was admitted at our Unit of Neurosurgery with a 1-month history of gait disturbance, postural instability, speech disorders, and occasional incontinence. Computed tomography scan and magnetic resonance imaging showed a mixed-density neoplasm in the left frontotemporal area, with anterior cerebral falx shift, and perilesional edema. The patient underwent surgical procedure; microsurgical excision of the lesion was performed through left pterional approach. Histopathological and immunohistochemical examination revealed monomorphic round cells of the neuronal lineage, with a percentage of Ki-67 positive nuclei <5% and no evidence of mitosis or necrotic areas. According to radiologic features, this pattern was compatible with the diagnosis of EVN. Patient had a favorable recovery and he is still in follow-up. Conclusion: Because of their rarity, clinical, radiologic, and histopathological characteristics of EVNs are not yet well defined, as well as the optimal therapeutic management. Whereas EVNs are rarely described in literature, we aimed to share and discuss our experience along with a review of the published literature.
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Affiliation(s)
- Claudia Gaggiotti
- Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, University of Palermo, Italy
| | - Giuseppe Roberto Giammalva
- Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, University of Palermo, Italy
| | - Marco Raimondi
- Department of Scienze per la Promozione della Salute e Materno Infantile, Pathology Unit, University of Palermo, Italy
| | - Ada Maria Florena
- Department of Scienze per la Promozione della Salute e Materno Infantile, Pathology Unit, University of Palermo, Italy
| | - Rosa Maria Gerardi
- Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, University of Palermo, Italy
| | - Francesca Graziano
- Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, University of Palermo, Italy
| | - Silvana Tumbiolo
- Department of Neurosciences and Emergency, Division of Neurosurgery, Villa Sofia Hospital, Palermo, Italy
| | - Domenico Gerardo Iacopino
- Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, University of Palermo, Italy
| | - Rosario Maugeri
- Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, University of Palermo, Italy
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Romano N, Federici M, Castaldi A. Imaging of extraventricular neurocytoma: a systematic literature review. Radiol Med 2020; 125:961-970. [PMID: 32335813 DOI: 10.1007/s11547-020-01198-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Accepted: 04/13/2020] [Indexed: 01/25/2023]
Abstract
OBJECTIVE Extraventricular neurocytoma (EVN) was firstly described in 1997. The current literature regarding imaging of EVN is limited to sporadic case reports and case series. EVN is still poorly considered in the differential diagnosis by neuroradiologists, thus diagnosis remains challenging. In this systematic review, we summarize and discuss computed tomography (CT) and magnetic resonance imaging (MRI) features of EVN cases described in the literature, in order to provide useful informations to neuroradiologists. To the best of our knowledge, this is the most extensive review about imaging of EVN. MATERIALS AND METHODS A systematic review of the literature about imaging of EVN cases was done. Only case reports or case series in which imaging (CT and/or MRI) features were deeply described were included in the revision. Eligibility of studies was assessed independently by two authors and any disagreements resolved by discussion. RESULTS Our search strategy revealed 224 articles. After implementation of inclusion and exclusion criteria, 35 studies were considered, and a total of 79 cases of EVN were analyzed. CONCLUSION EVN has not specific characteristics, with a large and variable imaging spectrum. Usually it appears as a large tumor, with diameters superior to 40 mm, frequently involving the frontal lobe. CT density and MRI signal intensity typically mirror the presence of cystic, solid, or calcified elements; contrast enhancement is visible in 87% of cases. Today, diagnosis of EVN with only imaging techniques is not univocal; neuroradiologists can only suspect this type of lesion, while the definitive diagnosis remains histological.
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Affiliation(s)
- Nicola Romano
- Department of Diagnostic and Interventional Neuroradiology, E.O. Ospedali Galliera, Mura delle Cappuccine 14, 16028, Genoa, Italy.
| | - Margherita Federici
- Department of Diagnostic and Interventional Neuroradiology, E.O. Ospedali Galliera, Mura delle Cappuccine 14, 16028, Genoa, Italy
| | - Antonio Castaldi
- Department of Diagnostic and Interventional Neuroradiology, E.O. Ospedali Galliera, Mura delle Cappuccine 14, 16028, Genoa, Italy
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Katati M, Ortiz García I, Chamorro CI, Horcajadas Á, Hurtado A, Sánchez C, Iañez B, Saura E, García E, Busquier H. Complete resection of hypervascularised extraventricular neurocytoma after preoperative embolisation. Neurocirugia (Astur) 2018; 30:44-49. [PMID: 29680750 DOI: 10.1016/j.neucir.2018.03.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Revised: 03/02/2018] [Accepted: 03/05/2018] [Indexed: 11/26/2022]
Abstract
A 13-year-old female arrived at the Emergency Department with a two-week history of headache, and bilateral papilloedema on examination. The initial study with CT and MRI showed a large multicystic left frontal mass with calcification surrounded by peripheral oedema, subacute intralesional bleeding and association of multiple large vessels. She was initially operated on in another centre where a subacute haematoma was found, evacuating to multiple vessels and arteriolised veins. Despite the earlier neuroimaging findings, arteriovenous malformation (AVM) was suspected, so she was referred to our centre for further treatment. We performed angiography, MR angiography and MRI with advanced sequences, diagnosing a highly vascularised intra-axial tumour which was embolised. The patient was then definitively operated on, with the resulting finding of extraventricular neurocytoma (EVN). EVN are extremely rare lesions, not previously described in the literature as hypervascularised lesions, which in our case required prior angiography and embolisation for proper diagnosis and adequate management.
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Affiliation(s)
- Majed Katati
- Servicio de Neurocirugía, Hospital Virgen de las Nieves, Granada, España.
| | | | | | - Ángel Horcajadas
- Servicio de Neurocirugía, Hospital Virgen de las Nieves, Granada, España
| | - Alicia Hurtado
- Servicio de Neurocirugía, Hospital Virgen de las Nieves, Granada, España
| | - Carlos Sánchez
- Servicio de Neurocirugía, Hospital Virgen de las Nieves, Granada, España
| | - Benjamín Iañez
- Servicio de Neurocirugía, Hospital Virgen de las Nieves, Granada, España
| | - Enrique Saura
- Servicio de Neurocirugía, Hospital Virgen de las Nieves, Granada, España
| | - Ernesto García
- Servicio de Radiología, Hospital Virgen de las Nieves, Granada, España
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