Secondary malignant neoplasm of brain [C79.31], Reason for Study: ^Reason: history of NSCLC with multiple brain mets; completed whole brain RT; please evaluate post treatment History: brain metastases There are two lesions showing high signal intensity on FLAIR/T2 images without demonstrating significant differences in enhancing pattern located on 1) right superior frontal gyrus and 2) around the right pars marginalis. These findings are suggestive of developing vasogenic edema after radiation treatment.Other multiple nodular enhancing parenchymal lesions on bilateral hemispheres and left cerebellar hemisphere do not show any significant interval change in terms of the size of each lesion, number, configuration and enhancement pattern.Gyriform enhancing lesions at the right temporal lobe do not show any interval change since prior scan.There is no evidence of acute ischemic or hemorrhagic lesion on this scan.The ventricles, sulci and cisterns are symmetric and unremarkable. The midline structures and cranial-cervical junction are normal. Normal flow voids are identified in the major intracranial vessels. The paranasal sinuses and mastoid air cells are clear.
1. Interval development of vasogenic edema on the right frontal lobe superior frontal gyrus and adjacent to right pars marginalis which is likely to be related to radiation therapy.2. No change of other metastatic lesions in terms of size, number and MR characteristics since prior scan.3. No evidence of acute ischemic or hemorrhagic lesion