Oligodendroglioma CT: Difference between revisions

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==Overview==
==Overview==
Head CT scan may be helpful in the diagnosis of oligodendroglioma. Findings on CT scan suggestive of oligodendroglioma are round or oval, marginated, hypo- to isodense mass with [[hemorrhage]], [[calcification]], and ill-defined enhancement following intravenous contrast administration.
[[Head]] [[CT scan]] may be helpful in the [[diagnosis]] of [[oligodendroglioma]]. Findings on [[Computed tomography|CT scan]] [[Suggestion|suggestive]] of [[oligodendroglioma]] are round or [[oval]], marginated, hypo- to isodense [[mass]] with [[hemorrhage]], ribbon-like [[calcification]], ill-defined enhancement following [[intravenous]] [[contrast]] administration, [[pressure]] [[Erosion (dental)|erosion]]/remodelling of overlying [[skull]], and marked [[ventricular]] enlargement [[Suggestion|suggestive]] of [[hydrocephalus]].


==CT==
==CT==
*Head CT scan may be helpful in the diagnosis of oligodendroglioma  
*[[Head]] [[CT scan]] may be helpful in the [[diagnosis]] of [[oligodendroglioma]]
*Findings on CT scan suggestive of oligodendroglioma are listed below:<ref name="CTradiopaedia">Radiographic features of oligodendroglioma. Dr Henry Knipe and Dr Frank Gaillard et al. http://radiopaedia.org/articles/oligodendroglioma</ref><ref name="pmid20052406">{{cite journal| author=Stark AM, Hugo HH, Mehdorn HM, Knerlich-Lukoschus F| title=Acute Hydrocephalus due to Secondary Leptomeningeal Dissemination of an Anaplastic Oligodendroglioma. | journal=Case Rep Med | year= 2009 | volume= 2009 | issue=  | pages= 370901 | pmid=20052406 | doi=10.1155/2009/370901 | pmc=PMC2797365 | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=20052406  }} </ref><ref name=CTradio>Image courtesy of Dr. Frank Gaillard. Radiopaedia (original file [http://radiopaedia.org/cases/anaplastic-oligoastrocytoma here]). Creative Commons BY-SA-NC</ref><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><ref name=swct>Oligodendrogliomas. SurgWiki 2015. http://www.surgwiki.com/wiki/Intracranial_tumours,_infection_and_aneurysms#Oligodendroglioma</ref>
*Findings on [[Computed tomography|CT scan]] [[Suggestion|suggestive]] of [[oligodendroglioma]] are listed below:<ref name="CTradiopaedia">Radiographic features of oligodendroglioma. Dr Henry Knipe and Dr Frank Gaillard et al. http://radiopaedia.org/articles/oligodendroglioma</ref><ref name="pmid20052406">{{cite journal| author=Stark AM, Hugo HH, Mehdorn HM, Knerlich-Lukoschus F| title=Acute Hydrocephalus due to Secondary Leptomeningeal Dissemination of an Anaplastic Oligodendroglioma. | journal=Case Rep Med | year= 2009 | volume= 2009 | issue=  | pages= 370901 | pmid=20052406 | doi=10.1155/2009/370901 | pmc=PMC2797365 | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=20052406  }} </ref><ref name="CTradio">Image courtesy of Dr. Frank Gaillard. Radiopaedia (original file [http://radiopaedia.org/cases/anaplastic-oligoastrocytoma here]). Creative Commons BY-SA-NC</ref><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><ref name="swct">Oligodendrogliomas. SurgWiki 2015. http://www.surgwiki.com/wiki/Intracranial_tumours,_infection_and_aneurysms#Oligodendroglioma</ref>
**Round or oval, sharply marginated mass involving the cortex or subcortical white matter
**Round or [[oval]], sharply marginated [[mass]] involving the [[cortex]] or [[subcortical]] [[white matter]]
**Hypodense to isodense mass
**Hypodense to isodense [[mass]]
**[[Hemorrhage]]
**[[Hemorrhage]]
**Overlying [[skull]] may show pressure erosion
**Overlying [[skull]] may show [[pressure]] [[Erosion (dental)|erosion]]/remodelling
**[[Calcification]] (70-90%)
**[[Calcification]] (70-90%)
***Located centrally or peripherally
***[[Location parameter|Located]] [[Central|centrally]] or peripherally
***May be ribbon-like
***May be ribbon-like
**Ill-defined enhancement (50%) following intravenous contrast administration
**Ill-defined [[Enhancer|enhancement]] (50%) following [[intravenous]] [[contrast]] administration
**Marked ventricular enlargement suggestive of [[hydrocephalus]]
**Marked [[ventricular]] enlargement [[Suggestion|suggestive]] of [[hydrocephalus]]
{| class="wikitable"
|+Oligodendroglioma CT characteristics
! style="background: #4479BA; width: 200px;" | {{fontcolor|#FFF|CT type}}
! style="background: #4479BA; width: 200px;" | {{fontcolor|#FFF|Tumor characteristics on CT}}
|-
| style="padding: 5px 5px; background: #DCDCDC; font-weight: bold" |'''Non-[[contrast]] [[CT]]'''
|
* [[Tumors]] are of mixed [[density]] i.e. from hypodense to isodense
* High-[[attenuation]] [[Area|areas]] within the [[tumor]] are due to:
** [[Calcification]] most likely (70-90% of [[oligodendrogliomas]] are [[Calcification|calcified]]), which can be [[Location parameter|located]] [[Central|centrally]], peripherally or they can be ribbon-like
** [[Hemorrhage]] (less commonly)
* Overlying [[skull]] may show [[pressure]] remodelling
|-
| style="padding: 5px 5px; background: #DCDCDC; font-weight: bold" |'''Post-[[contrast]] [[CT]]'''
|
* Approximately 50% of [[oligodendrogliomas]] [[Enhancer|enhance]] with [[Degree (angle)|degree]] of [[Enhancer|enhancement]] being extremely [[variable]], [[Range (statistics)|ranging]] from:
** No [[Enhancer|enhancement]] to
** Strikingly vivid [[Enhancer|enhancement]]
|}
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{|
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[[File:Oligodendroglioma axial noncontrast CT.jpg|thumb|250px|none|Right temporal hypodense space occupying lesion which contains internal central calcifications.[http://radiopaedia.org/articles/oligodendroglioma Source: Dr. Henry Knipe and Dr Frank Gaillard et al.. Radiopaedia]]]
[[File:Oligodendroglioma axial noncontrast CT.jpg|thumb|250px|none|Right temporal hypodense space occupying lesion which contains internal central calcifications.[http://radiopaedia.org/articles/oligodendroglioma Source: Dr. Henry Knipe and Dr Frank Gaillard et al.. Radiopaedia]]]
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{|
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[[File:CT oligodendroglioma calcification.jpg|thumb|250px|none|Oligodendroglioma that is highly calcified. [http://www.surgwiki.com/wiki/Intracranial_tumours,_infection_and_aneurysms#Oligodendroglioma]]]
[[File:CT oligodendroglioma calcification.jpg|thumb|250px|none|Oligodendroglioma that is highly calcified. [http://www.surgwiki.com/wiki/Intracranial_tumours,_infection_and_aneurysms#Oligodendroglioma]]]
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[[File:Oligodendroglioma 002.jpg|thumb|250px|none|Oligodendroglioma CT [https://commons.wikimedia.org/wiki/Category:CT_images_of_oligodendroglioma#/media/File:Oligodendroglioma_002.jpg]]]
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[[File:Oligodendrogliomact.png|thumb|250px|none|Oligodendroglioma CT [https://commons.wikimedia.org/wiki/Category:CT_images_of_oligodendroglioma#/media/File:Oligodendroglioma.png]]]
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|}
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Latest revision as of 14:10, 13 August 2019

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [4]Associate Editor(s)-in-Chief: Sara Mohsin, M.D.[5]Sujit Routray, M.D. [6]

Overview

Head CT scan may be helpful in the diagnosis of oligodendroglioma. Findings on CT scan suggestive of oligodendroglioma are round or oval, marginated, hypo- to isodense mass with hemorrhage, ribbon-like calcification, ill-defined enhancement following intravenous contrast administration, pressure erosion/remodelling of overlying skull, and marked ventricular enlargement suggestive of hydrocephalus.

CT

Oligodendroglioma CT characteristics
CT type Tumor characteristics on CT
Non-contrast CT
Post-contrast CT
Heterogeneous region of contrast enhancement, edema, and mass effect is present in the left frontal lobe.Source: Dr. Frank Gaillard. Radiopaedia
Right temporal hypodense space occupying lesion which contains internal central calcifications.Source: Dr. Henry Knipe and Dr Frank Gaillard et al.. Radiopaedia
Oligodendroglioma that is highly calcified. [1]
Oligodendroglioma CT [2]
Oligodendroglioma CT [3]

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. Henry Knipe and Dr Frank Gaillard et al.. Radiopaedia (original file here). Creative Commons BY-SA-NC
  5. ↑ Oligodendrogliomas. SurgWiki 2015. http://www.surgwiki.com/wiki/Intracranial_tumours,_infection_and_aneurysms#Oligodendroglioma

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