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[Correlation between MR imaging and histopathological findings of cystic metastatic brain tumors]
A Fukusumi1, S Iwasaki, N Ohkawa
1Department of Radiology, Nara Medical University.
Abstract:
To clarify the correlation between the histopathological findings and MR signal intensity of the cyst wall, fifteen cystic metastatic brain tumors of eleven patients were imaged using a 0.5T MR unit just before surgery, and the MRI findings were correlated with the histopathological findings of resected lesions. On T2-weighted images, all cyst walls showed hypointensity. On T1-weighted images, the intensity of the cyst wall could be classified into three groups, compared with the cerebral cortex. Walls with hyperintensity on T1WI(group H; n = 6) consisted of ample tumor cells, blood vessels and connective tissues, suggesting viable tumor cells. Iso-intense walls on T1W1(group I; n = 3)had abundant reactive glial tissues. Hypointense walls on T1W1 (group L; n = 5)revealed hemorrhage and/or hemosicerin in the wall, suggesting hemorrhagic necrosis. Thus a good correlation was demonstrated between the MR signal intensities and histopathological findings of cyst walls of cystic metastatic brain tumors. This may contribute not only to more precise diagnosis on MRI but also to more planning for treatment of cystic brain metastases.
Insights
Magnetic resonance imaging (MRI) signal intensity of brain tumor cyst walls correlates with histopathology. This finding aids in precise diagnosis and treatment planning for cystic brain metastases.
Area of Science:
- Radiology
- Neuro-oncology
- Pathology
Background:
- Cystic brain metastases present diagnostic challenges.
- Understanding the relationship between imaging and tissue characteristics is crucial for effective patient management.
Purpose of the Study:
- To correlate histopathological findings with MR signal intensity of cyst walls in metastatic brain tumors.
- To improve diagnostic accuracy and treatment strategies for cystic brain metastases using MRI.
Main Methods:
- Fifteen cystic metastatic brain tumors from eleven patients were imaged using 0.5T MRI prior to surgery.
- MRI findings were correlated with histopathological analysis of resected tumor specimens.
- T1-weighted and T2-weighted images were analyzed for cyst wall signal intensity.
Main Results:
- All cyst walls exhibited hypointensity on T2-weighted images.
- T1-weighted images revealed three distinct cyst wall signal intensity groups: hyperintense (viable tumor), isointense (reactive glial tissue), and hypointense (hemorrhage/hemosiderin, suggesting necrosis).
- A strong correlation was observed between MR signal intensities and histopathological findings.
Conclusions:
- MR signal intensity of cyst walls provides valuable histopathological information in cystic brain metastases.
- This correlation can enhance diagnostic precision and inform treatment planning for these lesions.