I have had an MRI done that reads "impressing L4 exiting nerve root" I have never heard of 'impressing'. I know abutment, radiculopathy, compression, and other similar words (I am a medical transcriptionist). Would 'impressing' be equivalent to any of these other terms or is it a typo? (My pain is left leg, atypical, as not the usual down the back of the leg, only on the outside of the leg).