Reason: Eval GBM. \R\1mo s/p RT/TMZ. History: GBM.. Resected 4/28/2015 radiation therapy completed one month ago. There are postsurgical changes of a right parietal craniotomy and resection of a right posterior frontal GBM. The resection cavity itself is decreased in size measuring 1.4 x 0.7 cm, previously 2.1 x 1.7 cm. FLAIR hyperintensity surrounding the resection cavity is mildly increased. Nodular enhancement surrounding the resection cavity is increased since the prior exam, particularly along the inferior margin. This region restricts on diffusion-weighted sequences, similar to the prior exam.The ventricles and basal cisterns are normal in size and configuration. There is no midline shift or herniation. The major cerebral flow voids are intact. The orbits, paranasal sinuses, and scalp soft tissues are grossly unremarkable.
Postsurgical changes of GBM resection with increased nodular enhancement surrounding the collapsed resection cavity. Given history of recent radiation, this may represent posttreatment changes, however close interval follow-up is recommended.