Astrocytoma MRI: Difference between revisions
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==MRI== | ==MRI== | ||
MRI may be helpful in the diagnosis of astrocytoma. Findings on MRI suggestive of astrocytoma include: | |||
* Low grade astrocytoma (pilocytic and diffuse astrocytoma) | |||
** T1: Decreased resonance in comparison to surrounding brain tissue | |||
** T2: Increased resonance in comparison to surrounding brain tissue | |||
* High grade astrocytoma | |||
** Anaplastic astrocytomas | |||
*** Hypointense T1 | |||
*** Hyperintense T2 | |||
*** There might be some contrast enhancement and edema | |||
** Glioblastoma multiform | |||
*** Irregular ring-nodular enhancing lesions | |||
*** Central necrosis | |||
*** Surrounding vasogenic edema | |||
=== Pilocytic astrocytoma === | ===== Pilocytic astrocytoma ===== | ||
[[File:Pilocytic-astrocytomaa.jpg|400px|none|thumb|Case courtesy of A.Prof Frank Gaillard, <a href="https://radiopaedia.org/">Radiopaedia.org</a>. From the case <a href="https://radiopaedia.org/cases/8474">rID: 8474</a>]] | [[File:Pilocytic-astrocytomaa.jpg|400px|none|thumb|Case courtesy of A.Prof Frank Gaillard, <a href="https://radiopaedia.org/">Radiopaedia.org</a>. From the case <a href="https://radiopaedia.org/cases/8474">rID: 8474</a>]] | ||
=== Diffuse astrocytoma === | ===== Diffuse astrocytoma ===== | ||
[[File:Diffuse-astrocytoma-nos-4.jpg|400px|none|thumb|Case courtesy of Dr Bruno Di Muzio, <a href="https://radiopaedia.org/">Radiopaedia.org</a>. From the case <a href="https://radiopaedia.org/cases/41396">rID: 41396</a>]] | [[File:Diffuse-astrocytoma-nos-4.jpg|400px|none|thumb|Case courtesy of Dr Bruno Di Muzio, <a href="https://radiopaedia.org/">Radiopaedia.org</a>. From the case <a href="https://radiopaedia.org/cases/41396">rID: 41396</a>]] |
Revision as of 20:15, 3 January 2019
Astrocytoma Microchapters |
Diagnosis |
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Treatment |
Case Study |
Astrocytoma MRI On the Web |
American Roentgen Ray Society Images of Astrocytoma MRI |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief: Ammu Susheela, M.D. [2]
Overview
MRI
MRI may be helpful in the diagnosis of astrocytoma. Findings on MRI suggestive of astrocytoma include:
- Low grade astrocytoma (pilocytic and diffuse astrocytoma)
- T1: Decreased resonance in comparison to surrounding brain tissue
- T2: Increased resonance in comparison to surrounding brain tissue
- High grade astrocytoma
- Anaplastic astrocytomas
- Hypointense T1
- Hyperintense T2
- There might be some contrast enhancement and edema
- Glioblastoma multiform
- Irregular ring-nodular enhancing lesions
- Central necrosis
- Surrounding vasogenic edema
- Anaplastic astrocytomas
Pilocytic astrocytoma
Diffuse astrocytoma
Anaplastic astrocytoma