Benign neoplasm of cranial nerves [D33.3] / Unspecified sensorineural hearing loss [H90.5], Reason for Study: ^Reason: re-evaluate known acoustic neuroma History: Unilateral SNHL Previously shown right IAC homogeneously enhancing mass lesion appears to be slightly increase in size especially short axis (on axial scan the width was measured about 6.6mm at the level of IAC entrance which was about 4.5mm). The long axis measurement also shows interval increase (14.6mm on axial scan and was 12.4mm). In addition, the mesial aspect of the mass is now demonstrating bulbous appearance which was relatively flat on prior scan.The right 6th nerve was not clearly visualized due to overlapped tortuous basilar artery. Otherwise bilateral 5th, left 6th, left 7th, left 8th and bilateral 9th to 11th cranial nerve complexes appear to be normal. The brainstem, cerebellum, vermis and tonsils are normal. The ventricles, cerebral sulci and cisterns are symmetric and unremarkable. lear.
Interval increase in size and change in shape especially mesial aspect of the known right IAC homogeneously enhancing mass as described above.