Astrocytoma CT: Difference between revisions

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Revision as of 17:32, 3 January 2019

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

Overview

CT findings

CT scan may be helpful in the diagnosis of astrocytoma. Findings on CT scan suggestive of astrocytoma include:

In low grade astrocytoma:
- Poorly demarcated mass
- Low density
- No inhancement inside the tumor
- In few cases we might see some calcification and cystic changes inside the mass
In high grade astrocytoma:
- Poorly demarcated mass
- Low density
- There are partial enhancement inside the tumor mass

Pilocytic astrocytoma

Diffuse astrocytoma

Anaplastic astrocytoma

References

Template:Nervous tissue tumors

Template:WikiDoc Sources

@@ Line 16: / Line 16: @@
 ** There are partial enhancement inside the tumor mass
-{|
+=== Pilocytic astrocytoma ===
-| valign="top" |
-[[File:Pilocystic 03.jpg|thumb|center|200 px|Axial non contrast CT in a nine-year-old girl showing a slightly hypodense mass in the tectum of the brainstem, compressing the aqueduct of Sylvius and causing obstructive hydrocephalus<SMALL><SMALL>''[https://en.wikipedia.org/wiki/Pilocytic_astrocytoma#/media/File:Pilocytic.jpg]''<ref name="Wikipedia">{{Cite web | title = Wikipedia| url = https://en.wikipedia.org/wiki/Pilocytic_astrocytoma#/media/File:Pilocytic.jpg}}</ref></SMALL></SMALL>]]
-|}
-===Low grade infiltrative astrocytoma<ref name="Radiopaedia2015">{{cite web | title = Low grade infiltrative astrocytoma [Dr Bruno Di Muzio and Dr Frank Gaillard]| url = http://radiopaedia.org/articles/low-grade-infiltrative-astrocytoma }}</ref>===
+=== Diffuse astrocytoma ===
-* Typically low grade infiltrating astrocytomas appear as isodense or hypodense regions of positive mass effect, often without any enhancement (in fact presence of enhancement would suggest high [[tumor]]s), although particularly gemistocytic astrocytomas can demonstrates wispy enhancement.
-* [[Calcification]] is not seldom (10-20% of cases)1 and may be related to oligodendroglial components (i.e oligoastrocytoma).
-* Cystic or [[fluid]] attenuation components are also encountered, particularly in gemistocytic and protoplasmic varieties.
-*
+=== Anaplastic astrocytoma ===
-===Anaplastic astrocytomas<ref name="Radiopaedia">{{cite web | title = Anaplastic astrocytoma [Dr Bruno Di Muzio and Dr Frank Gaillard]| url = http://radiopaedia.org/articles/anaplastic-astrocytoma }}</ref>===
-* [[CT]] appearances are intermediate, appearing as regions of low attenuation with positive [[mass]] effect. Enhancement is variable.
 ==References==
 {{reflist|2}}