Reason: Evaluate for growth of meningioma. History: meningioma s/p RT in 2011. Biventricular diameter currently measures 41 mm in width and on the prior exam measured the same. Third ventricular diameter measures 9 mm and previously measured 11 mm in the temporal horns the lateral ventricles remain mildly dilated and are unchanged.There is a redemonstration of an extra-axial mass located at the left cerebellopontine angle cistern which measures 28 x 23 mm axial dimensions on the current exam and previously on the May 2014 exam measured the same. In 2009 it measured 26 x 21 mm. it has not changed substantially and signal characteristics. It remains bright on diffusion weighted imaging. There is no associated extension into the left internal auditory canal appreciated. The mass impresses on the left middle cerebellar peduncle and distorts the adjacent brainstem and left middle cerebellar peduncle. There is T2 signal hyperintensity within the left middle cerebellar peduncle which was also present on the prior exam.Normal vascular flow voids are present in the distal carotid and vertebral arteries, the basilar artery and the proximal anterior, middle and posterior cerebral arteries as well as the internal cerebral veins and superior sagittal sinus.The visualized portions of the paranasal sinuses and demonstrate some mucosal thickening in the right maxillary sinus associated with an air fluid level. The visualized portions of the mastoid air cells are clear. The visualized portions of the orbits are intact.
1.A left cerebellopontine angle cistern extra-axial mass compatible with meningioma remains stable.2.Mild ventriculomegaly is stable.3.Air-fluid level right maxillary sinuses a nonspecific finding, however, acute sinusitis may have a similar appearance. Please correlate with the patient's clinical symptoms