Within the left posterior aspect of the pons, reaching the fourth ventricle to the left of the midline and origin of the left middle cerebellar peduncle, is a 1.5 x 2cm lesion with a haemosiderin ring and bubbly hyperintense centre with some areas of met haemoglobin. Features are characteristic of a cavernous malformation.
Posterior to it is a vague region of apparent increased T2 signal although the significance of this is uncertain, and may be artefactual. Followup recommended. Scattered white matter hyperintensities are seen elsewhere, beyond what would be expected in a patient of 50.