Diagnosis: Malignant neoplasm of brain, unspecifiedClinical question: oligodendroglioma. S/p RT and PCV. Please compare to prior MRI and older MRIs.Signs and Symptoms: oligodendroglioma.Comments: Oligodendroglioma s/p surgery, RT, and now PCV. Please compare to prior MRI and earlier MRIs. | The patient is status post right frontal craniotomy for removal of a predominantly nonenhancing right frontal lobe mass known to represent oligodendroglioma. There is contrast enhancement along the surgical margins . Some susceptibility effect is present along the resection margins in the right frontal lobe which was also present on the prior exam. Some T2 signal changes present along the brain parenchyma adjacent to the resection margins remains.A focus of diffusion restriction present present in the right half the genu of the corpus callosum no longer displays diffusion restriction and is smaller on the current exam. There is now ex vacuo effect of the frontal horn of the right lateral ventricle adjacent to the site of this previously noted focus of diffusion restriction.There is confluent signal change present adjacent to the frontal horns of the lateral ventricles bilaterally which is increased since the prior exam.Since the prior exam there postoperative changes have regressed.Normal vascular flow voids are present in the distal carotid and vertebral arteries, the basilar artery and the proximal anterior, middle and posterior cerebral arteries as well as the internal cerebral veins and superior sagittal sinus.The visualized portions of the paranasal sinuses demonstrate mild mucosal thickening. The visualized portions of the mastoid air cells are clear. The visualized portions of the orbits are intact.
1.There is no convincing evidence for recurrent tumor at this time.2.There is some periventricular white matter signal change present which is suspected to be treatment related.