Heterogenous signal intensity on T1 and T2 weighted images and blooming on SWI. There is no obvious post-contrast enhancement seen. T2/FLAIR hyperintense perilesional oedema is seen extending superiorly to adjacent corona radiata and inferiorly to the retrolentiform and sublentiform regions. Resultant mass-effect is seen in the form of effacement of body of ipsilateral lateral ventricle with dilatation of the frontal, temporal and occipital horns of the left lateral ventricle. There is also mild dilatation of the right lateral ventricle, likely due to obstruction at the level of foramen of Monro. The third ventricle is effaced. The fourth ventricle appears normal. There is midline shift to the right. Left uncal herniation is seen causing mild rotation of the midbrain.
A thin linear hyperdense vessel is seen along the anterosuperior aspect of the lesion, which shows blooming on SWI. However, it shows enhancement on post-contrast images and therefore likely represents venous congestion.