Male, 15 years old, status post craniotomy for tumor resection. Since the prior examination, near complete resection of the previously seen large left parietal lobe enhancing tumor been performed. An irregular resection cavity is evident containing blood product. Mild enhancement surrounding the superior margin of the cavity is nonspecific and may reflect postoperative change or mild residual tumor. Areas of residual enhancing tumor are seen along the inferior resection cavity margin and extending along the adjacent ependyma of the left lateral ventricular atrium.Extensive vasogenic edema centered on the resection cavity and involving the left posterior frontal, parietal, occipital and temporal lobes shows no significant change in extent. However, there has been some reduction of regional mass effect with improvement in midline shift and less effacement of the ventricular system.Postoperative findings are seen compatible with prior resection of an enhancing mass from along the left anterior temporal lobe. No residual enhancement is seen at this operative site.A 4 mm enhancing nodule is seen within the left lateral ventricle, adjacent to the septum pellucidum, which shows no significant interval change from the immediate prior examination. This lesion was not evident on the examination of 11/16/2015.
1.Interval near complete resection of the previously seen large left parietal lobe tumor. A small amount of residual tumor is evident along the inferior margin of the resection cavity, and extending along the ependyma of the left ventricular atrium. Mild enhancement along the superior margin of the resection cavity could represent residual tumor or postoperative change.2.The overall extent of vasogenic edema associated with this lesion is not significantly changed, though there has been some improvement in regional mass effect.3.A 4 mm intraventricular enhancing nodule within the left lateral ventricle, adjacent to the septum pellucidum, is unchanged from the immediate prior examination and likely represents a small tumor deposit. No additional enhancing lesions are seen.