Neoplasm of unspecified behavior of brain [D49.6], Reason for Study: ^Reason: preop planning for biopsy of brain lesion History: none- planning Multiple fiducial markers are seen on the scalp.Left parietal resection cavity with left fronto-parietal and corpus callosum abnormal high signal intensity on T2 weighted images without significant enhancement on Gad are again demonstrated, no change since prior scan.Lower pontine cavernous malformation again is seen, no change since prior 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 mastoid air cells are clear.Retention cyst on the right maxillary sinus.
Pre-operative scan with STEALTH protocol has been obtained.No change of left hemispheric lesion as well as lower pontine cavernous malformation since prior scan.