MRI of Intramedullary Spinal Cord Ganglioglioma

T1-weighted MRI with gadolinium enhancement of an intramedullary ganglioglioma:
General Findings

  • 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: