This case was histologically proven to be a protoplasmic astrocytoma, which is one of the variants of diffuse low grade astrocytomas. The term diffuse infiltrating means there is no identifiable border between the tumour and the normal brain tissue even though the borders may appear well marginated on imaging.
This tumour tends to occur in young adults with a reported predilection to frontal and temporal lobe. On imaging they typically present as a cortical mass with a very high signal on T2 that characteristically suppress on FLAIR sequence (represent the areas with abundant microcystic change).
Until recently, protoplasmic astrocytomas were classified as a subtype low-grade astrocytoma, however, in the latest (2016) update to WHO classification of CNS tumours, protoplasmic astrocytomas no longer exists as a distinct entity.