There is a single ring-enhancing lesion centred on the left occipital lobe, which has a maximum diameter of 13 mm. There is considerable surrounding oedema within the left occipital and parietal lobes, resulting in effacement of the sulci. There is no midline shift and no effacement of the left lateral ventricle.
No other parenchymal lesions are identified. The brainstem and posterior fossa have normal appearances. The ventricular system is unremarkable and the basal cisterns remain patent. The cranial vault and skull base are unremarkable.
13 mm left occipital ring-enhancing lesion, with significant surrounding cerebral oedema.
This most likely represents a neoplastic lesion (either primary or secondary) although the differential diagnosis includes an infective lesion.