 The exam is significantly limited by motion artifact. In addition, thin section post contrast images are not available through the level of Meckel's caves. The left Meckel's cave remain enlarged with minimal nodular enhancement, similar to the prior exam compared across coronal postcontrast images, but appears slightly decreased compared to 2014. A small soft tissue nodule remains along the left lateral prepontine cistern, although unchanged compared to prior exams. The left cavernous sinus is again slightly prominent. There is continued asymmetric absence of the left aspect of the clivus. The right Meckel's cave and trigeminal nerve are unremarkable.Postoperative changes are again seen from previous left frontal temporal craniotomy and left occipital cranioplasty. There is left frontal and temporal lobe encephalomalacia. Adjacent to the foci of encephalomalacia is a stable prominent extra axial space. There is stable focal encephalomalacia of the ventral left pons. Persistent fatty atrophy of the left sided muscles of mastication is likely related to surgical denervation. Right parietal approach ventriculostomy catheter is partially visualized. Ventricular caliber appears grossly stable. Pituitary stalk remains slightly deviated to the right. There is scattered mucosal thickening throughout the paranasal sinuses
Significantly motion limited exam. Compared to most recent prior exam, no significant interval change in appearance of left Meckel's cave, with decreased enhancing tissue compared to 2014 as well as more remote exams, favored to represent granulation tissue. Minimal nodular enhancement remaining in the left lateral prepontine cistern.