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Expression Analysis of Mammalian Linker-histone Subtypes
Published on: March 19, 2012
WHO grade I meningioma subtypes: MRI features and pathological analysis
Tao Zhang1, Jian-Min Yu1, Yong-Qi Wang1
1Department of Radiology, Weifang People's Hospital, Weifang, 261000, China.
Aims:
WHO grade I meningiomas include several subtypes that differ in terms of surgical planning and prognosis. We aim to analyze the relationship between magnetic resonance imaging (MRI) features and pathological parameters for each WHO grade I meningioma subtype to improve diagnostic value.
Materials And Methods:
Patients with WHO grade I meningiomas underwent pathology pathological examination and surgery at our hospital. MRI findings included signal intensity on T1WI and T2WI and, the enhancement degree in contrast-enhanced, and the degree of peritumoral edema in patients were reviewed. 1H-MRS was performed for the different meningioma subtypes. The correlation between MRI features and pathology was determined using a Kruskal-Wallis H test (P < 0.05).
Key Findings:
Angiomatous meningiomas mainly showed a low T1WI signal, a high T2WI signal, a high occurrence rate of peritumoral edema, mainly with moderate or severe peritumoral edema, and homogeneous enhancement. Meningothelial meningiomas mainly showed T1WI and T2WI iso-intense signals, mainly moderate or severe peritumoral edema, and moderate enhancement. Mixed, fibroblastic, and psammomatous meningiomas showed mixed signals, much overlap of the T1WI and T2WI signals, mainly mild or moderate peritumoral edema, and mild or moderate enhancement that could be inhomogeneous. A significant difference was noted in apparent diffusion coefficient (ADC) values and in some 1H-MRS indicators among different meningioma subtypes.
Significance:
Angiomatous meningiomas were the most easily identified subtype, followed by meningothelial meningiomas. No obvious difference was observed among the mixed, fibroblastic, and psammomatous meningiomas, but differences were observed between angiomatous and meningothelial meningiomas.
Insights
Magnetic resonance imaging (MRI) features can help differentiate subtypes of WHO grade I meningiomas. Angiomatous and meningothelial meningiomas show distinct MRI characteristics, aiding in diagnosis.
Area of Science:
- Neurosurgery
- Neuroradiology
- Neuropathology
Background:
- WHO grade I meningiomas encompass diverse subtypes with varying prognoses.
- Accurate subtype differentiation is crucial for tailored surgical planning and patient management.
Purpose of the Study:
- To investigate the correlation between magnetic resonance imaging (MRI) features and pathological parameters across different WHO grade I meningioma subtypes.
- To enhance the diagnostic value of MRI in classifying meningioma subtypes.
Main Methods:
- Retrospective analysis of MRI findings (T1WI, T2WI, enhancement, edema) in patients with WHO grade I meningiomas.
- Utilized proton magnetic resonance spectroscopy (1H-MRS) and reviewed pathological examination results.
- Statistical analysis using Kruskal-Wallis H test to determine correlations (P < 0.05).
Main Results:
- Angiomatous meningiomas: low T1WI, high T2WI, high edema, homogeneous enhancement.
- Meningothelial meningiomas: iso-intense T1WI/T2WI, moderate/severe edema, moderate enhancement.
- Mixed, fibroblastic, psammomatous meningiomas: mixed signals, mild/moderate edema, variable enhancement.
- Significant differences observed in apparent diffusion coefficient (ADC) values and 1H-MRS indicators among subtypes.
Conclusions:
- Angiomatous and meningothelial meningiomas exhibit distinct MRI signatures, facilitating their identification.
- Distinguishing between mixed, fibroblastic, and psammomatous subtypes based on MRI alone remains challenging.
- MRI features combined with advanced techniques like 1H-MRS show promise in improving meningioma subtype classification.
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