Malignant neoplasm of brain, unspecified site [191.9], Reason for Study: ^Reason: Eval GBM. History: GBM. Redemonstration of the post resection cavity of the right frontal GBM which does not show any interval change in terms of maximum diameter (54mm x 42mm x 63mm) and MR characteristics.There is no evidence of abnormal enhancement except overlying dural enhancement which does not show any interval change since prior exam.Patchy high signal intensity on the peripheral side of the resection cavity on FLAIR/T2 images do not show any interval change since prior scan.No change of retention cyst in the sphenoid sinus.Extra axial fluid collections on craniotomy site has been smaller since prior scan (maximum thickness 4mm from 9mm).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. No change of post resection cavity since prior scan in terms of size and MR characteristics.2. No evidence of new or residual tumor.