 There is a large cystic intra-axial mass centered in the right medial frontal lobe in the right superior/middle frontal gyri with no significant enhancement and numerous foci of susceptibility representing calcification as seen on outside CT imaging documented on patient's electronic medical record. There is infiltrative masslike appearance involving the right superior frontal and cingulate gyri.The overall mass measures 79 x 50 mm on axial image series 501 image 26, and up to 51 mm AP on series 1002 image 93. There is no associated restricted diffusion within the cystic component or rim enhancement. There is moderate surrounding nonenhancing T2 hyperintense signal abnormality without extension across the corpus callosum. There is mass effect with midline shift to the left of 14 mm, with mass effect on the bilateral frontal horns, right greater than left and downward mass effect on the anterior corpus callosum.There is no acute infarct or separate focus of abnormal intracranial enhancement. There is mild entrapment of the left lateral ventricle. There is no transtentorial, uncal or cerebellar tonsillar herniation. There are bilateral maxillary sinus mucus retention cysts.
Intra-axial nonenhancing right frontal lobe mass with masslike infiltration involving the right superior frontal gyrus and cingulate gyrus and surrounding edema. There are foci of calcifications and a cystic component laterally. Mass is most favored to represent a primary brain neoplasm such as oligodendroglioma or oligoastrocytoma. I personally reviewed the Images and/or procedure with the Resident/Fellow and agree with this report.