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Lakhani DA, Mankad K, Chhabda S, Feizi P, Patel R, Sarma A, Pruthi S. Diffuse Leptomeningeal Glioneuronal Tumor of Childhood. AJNR Am J Neuroradiol 2020; 41:2155-2159. [PMID: 32912870 DOI: 10.3174/ajnr.a6737] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 06/01/2020] [Indexed: 01/22/2023]
Abstract
Diffuse leptomeningeal glioneuronal tumor is a newly defined entity under the neuronal and mixed neuronal-glial tumors category in the 2016 World Health Organization classification of brain tumors. In this series, we report clinical, radiologic, and histologic findings in 7 cases of diffuse leptomeningeal glioneuronal tumor. Our cases and literature review indicate that the most characteristic imaging finding is diffuse intracranial and intraspinal nodular leptomeningeal thickening and enhancement. This is often associated with small cyst-like, nonenhancing lesions. It should be noted that tumors sometimes bear nontypical features, for example, presenting as a solitary spinal cord mass without leptomeningeal involvement or with a dominant intracranial mass. In children with characteristic imaging findings and without clinical features of infection, the radiologist has an opportunity to promptly raise the possibility of diffuse leptomeningeal glioneuronal tumor, and thereby, affect streamlined diagnostic evaluation.
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Affiliation(s)
- D A Lakhani
- From the Department of Radiology (D.A.L., P.F.), School of Medicine, West Virginia University, Morgantown, West Virginia.,Department of Neuroradiology (D.A.L., P.F.), Rockefeller Neuroscience Institute, WV University, Morgantown, West Virginia.,Division of Internal Medicine (D.A.L.), Vanderbilt University Medical Center, Nashville, Tennessee
| | - K Mankad
- Department of Neuroradiology (K.M., S.C.), Great Ormond Street Hospital (GOSH), London, UK
| | - S Chhabda
- Department of Neuroradiology (K.M., S.C.), Great Ormond Street Hospital (GOSH), London, UK
| | - P Feizi
- From the Department of Radiology (D.A.L., P.F.), School of Medicine, West Virginia University, Morgantown, West Virginia.,Department of Neuroradiology (D.A.L., P.F.), Rockefeller Neuroscience Institute, WV University, Morgantown, West Virginia
| | - R Patel
- Department of Diagnostic and Interventional Imaging, Section of Neuroradiology (R.P.), The University of Texas Health Science Center at Houston, McGovern Medical School, Houston, Texas
| | - A Sarma
- Department of Radiology and Radiological Sciences (A.S., S.P.), Monroe Carell Jr. Children's Hospital, Vanderbilt University Medical Center, Nashville, Tennessee
| | - S Pruthi
- Department of Radiology and Radiological Sciences (A.S., S.P.), Monroe Carell Jr. Children's Hospital, Vanderbilt University Medical Center, Nashville, Tennessee.
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2
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Gatzert S, Durgam A, Raghuram K, Agarwal A. Primary diffuse leptomeningeal oligodendrogliomatosis with an isolated 1p deletion. Br J Neurosurg 2019:1-6. [PMID: 31752539 DOI: 10.1080/02688697.2019.1688253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
We report a case of primary diffuse leptomeningeal oligodendrogliomatosis with an isolated 1p deletion confirmed by fluorescent in situ hybridization (FISH) analysis in 52 year-old man. The MRI scan in a patient presenting with progressive headache, nausea and diplopia revealed diffuse leptomeningeal thickening and enhancement without definitive evidence of an intraparenchymal lesion. Biopsy of thickened, enhancing meninges within the left sylvian fissure revealed subarachnoid proliferation of oligodendroglial cells with varying degrees of de-differentiation and sparing of the underlying cortex. An isolated 1p deletion was confirmed by FISH analysis. This is the first reported adult case of a 1p deletion in primary diffuse leptomeningeal oligodendrogliomatosis.
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Affiliation(s)
- Samuel Gatzert
- Department of Radiology, UT Southwestern Medical School, Dallas, TX, USA
| | - Aditya Durgam
- Department of Radiology, UT Southwestern Medical School, Dallas, TX, USA
| | | | - Amit Agarwal
- Department of Radiology, UT Southwestern Medical School, Dallas, TX, USA
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