Atypical teratoid rhabdoid tumor CT: Difference between revisions

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{{Atypical teratoid rhabdoid tumor}}
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==Overview==
==Overview==
Head CT scan is helpful in the diagnosis of atypical teratoid rhabdoid tumor. On head CT scan, atypical teratoid rhabdoid tumor is characterized by an isodense, calcified mass with heterogenous enhancement. There may be associated findings of [[obstructive hydrocephalus]].<ref name=ctatrt1>CT brain radiographic features of Atypical teratoid/rhabdoid tumour. Dr Bruno Di Muzio and A.Prof Frank Gaillard et al. Radiopaedia 2015. http://radiopaedia.org/articles/atypical-teratoidrhabdoid-tumour. Accessed on December 16, 2015</ref>
==CT==
==CT==
The initial diagnosis of a tumor is made with a [[Medical radiography|radiographic]] study ([[Magnetic Resonance Imaging|MRI]]<ref>
*Head CT scan is helpful in the diagnosis of atypical teratoid rhabdoid tumor.
{{cite journal |author=Meyers SP, Khademianc ZP, Biegeld JA, Chuange SH, Koronesb DN, Zimmerman RA |title=Primary Intracranial Atypical Teratoid/Rhabdoid Tumors of Infancy and Childhood: MRI Features and Patient Outcomes |journal=American Journal of Neuroradiology |volume=27 |issue=5 |pages=962-971 |year=2006 |month=May |url=http://www.ajnr.org/cgi/content/full/27/5/962 | accessdate = 2008-05-05 }}</ref> or [[Computed Tomography|CT]]-).  If CT was performed first, a MRI is usually performed as the images are often more detailed and may reveal previously undetected [[Metastasis|metastatic]] tumors in other locations of the brain.
*On head CT scan, atypical teratoid rhabdoid tumor is characterized by:<ref name=ctatrt1>CT brain radiographic features of Atypical teratoid/rhabdoid tumour. Dr Bruno Di Muzio and A.Prof Frank Gaillard et al. Radiopaedia 2015. http://radiopaedia.org/articles/atypical-teratoidrhabdoid-tumour. Accessed on December 16, 2015</ref>
 
:*Isodense to gray matter
The tumors' appearance on CT and MRI are nonspecific, tending towards large size, [[Metastatic calcification|calcifications]], [[Necrosis|necrosis (tissue death)]],and hemorrhage (bleeding). Radiological studies alone cannot identify AT/RT; a pathologist almost always has to evaluate a brain tissue sample.
:*May demonstrate heterogeneous enhancement
 
:*[[Calcification]] is common
The increased cellularity  of the tumor may make the appearance on  an uncontrasted CT to have increased attenuation.
:*May show associated [[obstructive hydrocephalus]]


==References==
==References==
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Latest revision as of 15:11, 22 December 2015

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

Overview

Head CT scan is helpful in the diagnosis of atypical teratoid rhabdoid tumor. On head CT scan, atypical teratoid rhabdoid tumor is characterized by an isodense, calcified mass with heterogenous enhancement. There may be associated findings of obstructive hydrocephalus.[1]

CT

  • Head CT scan is helpful in the diagnosis of atypical teratoid rhabdoid tumor.
  • On head CT scan, atypical teratoid rhabdoid tumor is characterized by:[1]

References

  1. 1.0 1.1 CT brain radiographic features of Atypical teratoid/rhabdoid tumour. Dr Bruno Di Muzio and A.Prof Frank Gaillard et al. Radiopaedia 2015. http://radiopaedia.org/articles/atypical-teratoidrhabdoid-tumour. Accessed on December 16, 2015

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