Ringing in ears. Feel normal once again?

Hello, My mother has been complaining about constant ringing in her left ear from a few months now. She visited a local ENT specialist, had audiometry done & wax removed (though there wasn't much). But the ringing persisted. She recently underwent an MRI scan and the report came back saying "Well defined isointense extra axial lesion noted in left parietal convexity measuring 12.4 x 16 x 12.8 mm. Central blooming noted. Homogenous post contrast enhancement noted. No significant mass effect". I have attached her report herewith. Please let me know if this is something to be worried about, what is the next course of action to be taken or if there's any treatment she can undergo to feel normal once again? Really appreciate any help. Thanks in advance. Sneha