Pineal parenchymal tumor of intermediate differentiation preoperative planning. There are postoperative findings related to partial resection of a pineal tumor via a posterior approach. The residual tumor measures up to 40 mm and protrudes into the thalami bilaterally. There is encephalomalacia and superimposed edema in the right occipital lobe, with adjacent extra-axial fluid, blood products, and hemostatic agent along the surgical approach. The ventricles have not significantly changed in size, with a right transfrontal ventricular catheter in position. There are unchanged scattered nonspecific foci of T2 hyperintensity in the cerebral white matter. There is a left occipital subcutaneous nodule that measures up to 20 mm. There is fluid within the left mastoid air cells.
1. Preoperative planning for resection of a residual pineal region tumor.2. No significant change in size of the shunted ventricular system.3. Nonspecific left occipital subcutaneous nodule. 