T1-weighted MRI with gadolinium enhancement of an intramedullary ganglioglioma:
General Findings
T1-weighted MRI with gadolinium enhancement of an intramedullary ganglioglioma:
- Spinal cord diameter enlarged.
- Eccentric epicenter for tumor.
- Average length of the tumor is 8 spinal segments, which is twice that of astrocytomas.
- Cysts in 46%.
T1-Weighted Sequence
- Mixed intensity: Only a small percentage are homogeneously hypointense or isointense.
- Blurred margins as with astrocytomas are common.
- Gadolinium enhances in most cases. 65% of cases will have patchy enhancement, while 20% will have focal enhancement, and 15% can show no enhancement.
T1-weighted MRI of an intramedullary ganglioglioma:
T1 MRI with gadolinium enhancement of an intramedullary ganglioglioma:
T2-Weighted Sequence
- Variable intensity: 60% of intramedullary gangliogliomas will be hyperintense while the remaining 40% will be heterogeneous.
T2-weighted MRI of an intramedullary ganglioglioma:
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