Craniopharyngioma MRI: Difference between revisions
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===Papillary=== | ===Papillary=== | ||
The findings on MRI are: | Papillary craniopharyngioma tend to be more ''spherical'' in outline and usually lack the prominent cystic component; most are either ''solid'' or contain a few smaller cysts. Calcification is uncommon or even rare in the papillary subtype. These tumors tend to displace adjacent structures. The findings on MRI are: | ||
*'''Cysts''' | *'''Cysts''' | ||
**When present they are variable in signal | **When present they are variable in signal | ||
Revision as of 01:28, 23 August 2015
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Craniopharyngioma Microchapters |
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Diagnosis |
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Treatment |
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Case Studies |
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Craniopharyngioma MRI On the Web |
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American Roentgen Ray Society Images of Craniopharyngioma MRI |
Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]Associate Editor(s)-in-Chief: Sujit Routray, M.D. [2]
Overview
MRI
The MRI findings depends on the type of craniopharyngioma.[1]
Adamantinomatous
Adamantinomatous type is the most common form (90%), and typically have a lobulated contour as a result of usually multiple cystic lesions. Solid components are present, but usually form a relatively minor component of the mass, and enhance vividly on CT scans. The calcification is very common (90%). These tumor have a predilection to be large, extending superiorly into the third ventricle, and encasing vessels, and even being adherent to adjacent structures. The findings on MRI are:
- Cysts
- Variable but 80% are mostly or partly T2 hyperintense
- T1: iso- to hyperintense to brain (due to high protein content machinery oil cysts)
- Solid component
- T1 C+ (Gd): vivid enhancement
- T2: variable or mixed
- Calcification
- Difficult to appreciate on conventional imaging
- Susceptible sequences may better demonstrate calcification
MR angiography: It may demonstrate displacement of the A1 segment of the anterior cerebral artery (ACA).
MR spectroscopy: Cyst contents may show a broad lipid spectrum, with an otherwise flat baseline.
Papillary
Papillary craniopharyngioma tend to be more spherical in outline and usually lack the prominent cystic component; most are either solid or contain a few smaller cysts. Calcification is uncommon or even rare in the papillary subtype. These tumors tend to displace adjacent structures. The findings on MRI are:
- Cysts
- When present they are variable in signal
- 85% T1 hypointense
- Solid component
- T1: iso- to lightly hypointense to brain
- T1 C+: vivid enhancement
- T2: variable/mixed
MR spectroscopy: Cyst contents does not show a broad lipid spectrum as they are filled with water fluid.
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Craniopharyngioma
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Craniopharyngioma
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Craniopharyngioma
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Craniopharyngioma
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Craniopharyngioma
References
- ↑ MRI findings of Craniopharyngioma. Dr Dylan Kurda and Dr Frank Gaillard et al. Radiopaedia 2015. http://radiopaedia.org/articles/craniopharyngioma