A peripherally lobulated hyperdense lesion with central round areas of hypodensity within the anterosuperior aspect of the pons appears to have minor enhancement. No supplying artery or draining vein identified. No surrounding edema. No positive nor negative mass effect. On the sagittal plane, it appears wedge like.
A second area of focal hyperdensity adjacent to the left occipital horn of the lateral ventricle appears to layer in the axial plane but does not on the sagittal plane.
Conclusion: The pontine lesion most likely represents a low flow vascular malformation (i.e. cavernoma or mixed cavernoma/telangietasia). Tumour is thought less likely.
Dependent left occipital horn lesion probably does not represent intraventricular blood, but rather a second cavernoma.