Oligodendrogliomas are common intra-axial
primary brain tumours, and carry special significance due to several key features, which when present provide better prognosis compared to other intra-axial
A brain computed tomography (CT) scan revealed a left frontal intra-axial
thick-walled ring-enhancing lesion with extensive surrounding edema, possibly a high-grade neoplastic lesion (glioma) involving the corpus callosum, or a contiguous inflammatory or infectious process originating from the skull base.
, a vascular malformation should be considered.
Magnetic resonance imaging (MRI) of the brain demonstrated a mixed cystic and solid, heterogeneously enhancing intra-axial
mass centered within the left frontal lobe effacing the adjacent frontal horn of the lateral ventricle (Figure 1).
Axial MR images demonstrate a T1 hypointense, T2 FLAIR hyperintense mass-like intra-axial
confluence centered within the right posterior frontal lobe and right superior parietal lobule with surrounding mass effect and minimal resulting right to left midline shift (Figures 2 and 3).
Angiographic anatomy demonstrated a purely intra-axial
GS typically appear as rapidly growing, heterogeneously enhancing intra-axial
masses comparable to GB with a temporal predominance [4, 6].
On the 11th postoperative day, the cerebral CT was repeated and showed the extended left tempo--parietal craniotomy, the inhomogeneous hypodense mass with edema and intra-axial
dilacerations at the level of the left cerebral hemisphere with a protrusion through the craniotomy orifice.
This technique produces greater discrimination of high-signal intra-axial
lesions adjacent to CSF or at brain-CSF interfaces.
Noncontrast brain CT scan revealed an intra-axial
lesion centered in the right thalamic region measuring 3.5 cm in maximal diameter with associated midline shift and downward herniation, most likely representing an abscess.
Axial T1WI (A), axial T2WI (B) and axial FLAIR (C) images show a well-defined intra-axial
cystic lesion with eccentric soft tissue mural nodule in right frontoparietal lobe.