The patient returns 9 months later. Repeat MRI is ordered.

MRI of the IACs Prior to & Following Contrast/ MRI of the Brain Prior to & Following Contrast: “Re-identified abnormal enhancement within the right IAC, currently measuring approximately 8 mm in its greatest longitudinal dimension.  Although nonspecific, an underlying VS is again suspected.”

• Has the tumor changed in size?
• Generally, how fast growing are vestibular nerve tumors?