Donald Corenman, MD, DC
Moderator
Post count: 8660

By your complaints, you have evidence of radiculopathy from foraminal stenosis which is a common sequela of an isthmic spondylolysthesis (see web site). However, you also complain of lower back pain which may be a sign of instability from the pars fractures. The fact that the lower back pain is only one sided may possibly be an indication of nerve irritability and not instability. The pain in the outside of the foot normally belongs to the S1 nerve root but would be unusual with an L5 isthmic spondylolysthesis, as this normally affects the L5 root. None-the-less, I have seen the L5 root occasionally cause this symptom.

The foraminotomy on the left at L5-S1 in the face of an isthmic spondylolysthesis can be problematic. The cause of the collapse and bone spur formation that leads to the nerve compression stems from the pars fractures and instability/ degenerative changes. Performing a foraminotomy can create further destabilization of the level.

In addition, if some of the pain is originating from your spondylolysthesis, foraminotomy surgery will not eliminate that pain. You can get an idea if most of the pain is originating only from the nerve by using a selective nerve root block (SNRB- see website). With great temporary relief- there is a reasonable chance that the pain is nerve only.

So to get to the point- foraminotomy can work to relieve leg pain but the chance of developing instability after the surgery is high and therefore, I personally don’t recommend it except in very special cases. The TLIF procedure for decompression of the root and permanent stabilization of the isthmic segment is most likely the procedure that has the best results for nerve pain from an isthmic spondylolysthesis. This procedure reconstructs the missing disc height and makes more room for the nerve. Yes- it is a fusion but this segment most likely has a degenerative disc along with root compression and pars fractures with possible instability.

Dr. Corenman

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Donald Corenman, MD, DC is a highly-regarded spine surgeon, considered an expert in the area of neck and back pain. Trained as both a Medical Doctor and Doctor of Chiropractic, Dr. Corenman earned academic appointments as Clinical Assistant Professor and Assistant Professor of Orthopaedic Surgery at the University of Colorado Health Sciences Center, and his research on spine surgery and rehabilitation has resulted in the publication of multiple peer-reviewed articles and two books.