Oligodendroglioma MRI: Difference between revisions

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*Typically no diffusion restriction
*Typically no diffusion restriction
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[[File:Oligodendroglioma axial FLAIR.jpg|thumb|250px|none| MRI axial FLAIR showing a relatively well circumscribed mass involving the temporal lobe and insular cortex, without convincing enhancement, and minimal restricted diffusion [http://radiopaedia.org/cases/oligodendroglioma-9 Source: Dr. Frank Gaillard. Radiopaedia]]]
Image:Oligodendroglioma axial FLAIR.jpg|<sub>MRI axial FLAIR showing a relatively well circumscribed mass involving the temporal lobe and insular cortex, without convincing enhancement, and minimal restricted diffusion.<ref name=MRIradio1>Image courtesy of Dr. Frank Gaillard. Radiopaedia (original file [http://radiopaedia.org/cases/oligodendroglioma-9 here]). Creative Commons BY-SA-NC</ref></sub>
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Image:Anaplastic oligoastrocytoma MRI T1.jpg|<sub>MRI including post contrast sequences demonstrates a large mass involving the majority of the left frontal lobe, which exerts significant mass effect resulting in midline shift and effacement of the frontal horn of the lateral ventricle. The mass is heterogeneous, but predominantly hypointense on T1 with a surrounding mantle of tumor edema. Following contrast there is heterogeneous moderate enhancement.<ref name=MRIradio2>Image courtesy of Dr. Frank Gaillard. Radiopaedia (original file [http://radiopaedia.org/cases/anaplastic-oligoastrocytoma here]). Creative Commons BY-SA-NC</ref></sub>
[[File:Bing neel mri.png|thumb|250px|none|Coronal T1-weighted (TR 600, TE 30) 3mm noncontrast sections through the inner ear in a patient with Waldenstrom macroglobulinemia with bilateral hearing loss. Arrows indicate hemorrhage within the labyrinth.[https://openi.nlm.nih.gov/detailedresult.php?img=PMC4891550_gr2&query=waldenstrom+macroglobulinaemia&it=xg&req=4&npos=67 Source: Shibata DK. et al.]]]
Image:Anaplastic oligoastrocytoma MRI T2.jpg|<sub>MRI including post contrast sequences demonstrates a large mass involving the majority of the left frontal lobe, which exerts significant mass effect resulting in midline shift and effacement of the frontal horn of the lateral ventricle. The mass is heterogeneous, but predominantly hyperintense on T2 with a surrounding mantle of tumor edema. Following contrast there is heterogeneous moderate enhancement.<ref name=MRIradio2>Image courtesy of Dr. Frank Gaillard. Radiopaedia (original file [http://radiopaedia.org/cases/anaplastic-oligoastrocytoma here]). Creative Commons BY-SA-NC</ref></sub>
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Image:Oligodendroglioma - anaplastic - haemorrhagic MRI axial DWI.jpg|<sub>A left frontal lobe mass with central haemorrhagic component is present (intrinsic high T1, low T2) with a peripheral region of enhancement and high T2 signal. Some of the enhancement may be in reaction to the haemorrhage, depending on the time course.<ref name=Radiopaedia>Image courtesy of Dr. Henry Knipe and Dr. Frank Gaillard et al. Radiopaedia (original file [http://radiopaedia.org/articles/oligodendroglioma here]). Creative Commons BY-SA-NC</ref></sub>
[[File:Mri diffuse gif.gif|thumb|250px|none|MRI brain coronal view shows diffuse meningeal enhancement in a patient with Bing-Neel syndrome.[https://openi.nlm.nih.gov/detailedresult.php?img=PMC4837273_CRIHEM2016-3931709.002&query=waldenstrom+macroglobulinaemia&it=xg&req=4&npos=69 Source: Halperin D. et al, Whipps Cross Hospital, London E11 1NR, UK.]]]
Image:Oligodendroglioma axial SWI.jpg|<sub>A sharply defined zone of abnormal slightly heterogeneous signal in the left parietal lobe extends to involve the medial cortex of the superior parietal lobule. Inferiorly it abuts and distorts the cingulate gyrus. Superiorly it is significantly posterior to the precentral gyrus and slightly posterior to the left post central gyrus. Posterior and laterally it extends to and distorts the left intraparietal sulcus. It extends to within 1 cm of the parieto-occipital fissure postero-medially, slightly posteriorly bowing it. It exhibits no restricted diffusion and no pathological contrast enhancement.<ref name=Radiopaedia>Image courtesy of Dr. Henry Knipe and Dr. Frank Gaillard et al. Radiopaedia (original file [http://radiopaedia.org/articles/oligodendroglioma here]). Creative Commons BY-SA-NC</ref></sub>
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==References==
==References==

Revision as of 16:15, 10 May 2019

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Sara Mohsin, M.D.[2]Sujit Routray, M.D. [3]

Overview

Brain MRI is helpful in the diagnosis of oligodendroglioma. On brain MRI, oligodendroglioma is characterized by a mass which is typically hypointense on T1-weighted images and hyperintense on T2-weighted images. Calcification is observed on T2 decay component of MRI.

MRI

  • Brain MRI may be helpful in the diagnosis of oligodendroglioma
  • Findings on MRI suggestive of oligodendroglioma are listed below:[1][2][3][4][5]
MRI component Findings

T1

  • Typically hypointense

T2

  • Typically hyperintense
  • Enlargement of the lateral ventricles and the third ventricle with periventricular high intensity signal suggestive of transependymal absorption or tumor spreading

T2 decay

T1 with gadolinium

  • Homogenous contrast enhancement

Diffusion weighted images

  • Typically no diffusion restriction
MRI axial FLAIR showing a relatively well circumscribed mass involving the temporal lobe and insular cortex, without convincing enhancement, and minimal restricted diffusion Source: Dr. Frank Gaillard. Radiopaedia
Coronal T1-weighted (TR 600, TE 30) 3mm noncontrast sections through the inner ear in a patient with Waldenstrom macroglobulinemia with bilateral hearing loss. Arrows indicate hemorrhage within the labyrinth.Source: Shibata DK. et al.
MRI brain coronal view shows diffuse meningeal enhancement in a patient with Bing-Neel syndrome.Source: Halperin D. et al, Whipps Cross Hospital, London E11 1NR, UK.

References

  1. ↑ Radiographic features of oligodendroglioma. Dr Henry Knipe and Dr Frank Gaillard et al. http://radiopaedia.org/articles/oligodendroglioma
  2. ↑ Stark AM, Hugo HH, Mehdorn HM, Knerlich-Lukoschus F (2009). "Acute Hydrocephalus due to Secondary Leptomeningeal Dissemination of an Anaplastic Oligodendroglioma". Case Rep Med. 2009: 370901. doi:10.1155/2009/370901. PMC 2797365. PMID 20052406.
  3. ↑ Image courtesy of Dr. Frank Gaillard. Radiopaedia (original file here). Creative Commons BY-SA-NC
  4. ↑ Image courtesy of Dr. Frank Gaillard. Radiopaedia (original file here). Creative Commons BY-SA-NC
  5. ↑ Image courtesy of Dr. Henry Knipe and Dr. Frank Gaillard et al. Radiopaedia (original file here). Creative Commons BY-SA-NC


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