Secondary malignant neoplasm of brain [C79.31] / Secondary malignant neoplasm of other parts of nervous system [C79.49], Reason for Study: ^Reason: metastatic NSCLC s/p resection of R sided metastasis and adjuvant WBRT; please evaluate for response/progress Previously seen right frontal operculum cystic lesion appears to be smaller in size (10.4mm x 16.1mm, previously 18mm x 12.2mm). In addition, the daughter nodules some are on the enhancing rim also appear to be smaller in size comparing to prior study. The extent of surrounding edema also appears to be lessen than prior scan.A small nodular enhancing lesion on the right middle frontal sulcus (series 11, image 117) is again shown, unchanged in its size and configuration since prior scan. No other abnormal enhancing lesion is seen.Scattered patchy FLAIR high signal intensity lesions on bilateral periventricular white matter are again seen, unchanged since prior scan.No evidence of acute ischemic lesion on this scan.Evidence of right fronto temporal craniotomy is seen, unchanged. 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. Fluid collections on the right mastoid air cells, unchanged.
1. Interval decrease in size of right frontal operculum mass as well as daughter nodules since prior scan as described above.2. No evidence of new abnormal enhancement.3. No acute ischemic lesion.4. Unchanged non specific small vessel ischemic lesions and right middle frontal sulcus enhancing lesion since prior scan.