There are two high T2 signal subependymal lesions within the right temporal pole. They appear high in T2 signal. The larger is 10 x 23 x 8 mm and appears to arises from the lateral aspect of the right hippocampus abutting the lateral margin of the right lateral temporal horn. The smaller lesion is medial to the right lateral temporal horn measuring 7mm. Both have a well defined margin with a high signal rim on FLAIR, and the centre of the lesions do not attenuate. No associated vasogenic oedema, haemorrhage or restricted diffusion. No increased cerebral blood flow is seen on the RBC arterial spin labelling study (not shown). A small focus of enhancement is demonstrated in the larger of the two lesions.
The ventricles and CSF spaces are unremarkable. Mucosal thickening of the right maxillary, right frontal and right ethmoidal sinuses.
Appearances suggest of a low grade temporal lobe tumour and are most in keeping with a dysembryoblastic neuroepithelial tumour (DNET), with a differential including ganglioglioma or pleomorphic xanthastrocytoma (PXA).