Reason: Eval for growth of GBM. This MRI will be \R\3mo post RT. History: GBM.. Postoperative changes of right frontal lobe GBM resection. Extra-axial fluid along the craniotomy flap is unchanged from the prior exam measuring 9 mm in thickness. There is persistent dural enhancement which is likely postoperative. There is a large surgical cavity in the right frontal lobe which demonstrates near resolution in surrounding enhancement. Patchy enhancement along the inferior margin of the cavity on the prior exam has resolved. Fluid within the surgical cavity has cleared and now exhibits signal characteristics close to CSF. Surrounding increased FLAIR signal is not significantly changed. Foci of susceptibility within the cavity are likely the result of old hemorrhage and are unchanged. No new enhancing lesions. Subtle T2 hyperintensity in the periventricular white matter has increased over the past several exams and is likely the result of radiation change. The ventricles are unchanged in size and configuration. Retention cyst/polyp in the sphenoid sinus is unchanged. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits and paranasal sinuses are unremarkable.
1.Expected postsurgical changes of right frontal GBM resection with near resolution of enhancement surrounding the resection cavity. No evidence of residual tumor.2.Extra-axial fluid along the craniotomy flap is unchanged from the prior exam.