case_images: PMC6417345_01
case_images: Computed tomography head showed a small, rounded iso-to-hyperdense lesion in the left high frontal lobe without any perilesional edema (a). A popcorn-shaped mass in the left high frontal lobe (marked with white arrow) with a peripheral hypointense rim was visualized on T2 and inversion recovery magnetic resonance imaging images (b and c). The lesion was situated in the premotor area at the posterior edge of the superior frontal sulcus (b-d). On contrast imaging, there was patchy enhancement of the lesion (d) along with a linear enhancing structure in the superior frontal sulcus (e and f) (marked with white arrow)
case_images: AJNS-14-318-g001.jpg
case_images: PMC6417345_01_AJNS-14-318-g001.jpg
case_images: F1
case_images: The CT head showed a small, rounded slightly hyperdense lesion in the left high frontal lobe [Figure 1a]. We investigated him further with a magnetic resonance imaging (MRI) of the head which showed a small, heterogeneous mass in the left high frontal lobe with a peripheral hypointense rim [Figure 1b and c]. The lesion was situated in the premotor area at the posterior edge of the superior frontal sulcus (SFS) [Figure 1b-d]. There was a small, rounded hyperdensity in the SFS just anterior to the lesion [Figure 1b]. On contrast imaging, there was patchy enhancement of the lesion [Figure 1d] along with a linear enhancing structure in the SFS [Figure 1e and f].
case_images: On intra-arterial angiogram, there were no abnormal arteries (a); however, a prominent vein (marked with black arrow) was seen at that location which was seen draining into the superior sagittal sinus (b)
case_images: AJNS-14-318-g002.jpg
case_images: PMC6417345_01_AJNS-14-318-g002.jpg
case_images: F2
case_images: However, a prominent vein draining into the superior sagittal sinus was seen [Figure 2a and b].