Known lesions, calcifications versus AVMs, please evaluate MRI Brain: Intrinsic T1 hyperintensity is seen in the left geniculate nucleus and in the right superior colliculus. The left geniculate nucleus lesion again measures 7 mm and the right superior collicular lesion measures 4 mm. These areas correlate with calcifications seen on the prior CT. It is difficult to assess for enhancement given the intrinsic T1 hyperintensity, however no significant enhancement is noted. No rim of susceptibility related artifacts or flow voids are seen within these lesions. No diffusion restriction is seen to suggest acute ischemia. The tectal plate is prominent without signal abnormalities, unchanged from the prior study. No mass effect or hydrocephalus.The CSF spaces are appropriate for the patient's stated age with no midline shift. Normal vascular flow voids are present in the major intracranial vasculature.The visualized portions of the paranasal sinuses are clear. The visualized portions of the mastoid air cells are clear. The visualized portions of the orbits are intact.MRA Brain:The intracranial anterior and posterior circulations are patent without evidence of aneurysm, stenosis, or dissection. No evidence of arteriovenous malformation.
1.No change in left thalamic or right superior colliculus calcified lesions. No specific findings to suggest underlying arteriovenous malformation or cavernous malformation. As such these may represent sequela of prior injury such as inflammation or infection or possibly metabolic abnormality. 2.The tectal plate is prominent in size without signal abnormalities or discrete mass effect. Finding may be developmental. No hydrocephalus. Long term follow-up of the above findings can be considered as clinically indicated.3.MRA is unremarkable without evidence of aneurysms or vascular malformations.