Hi TPatti, sorry you are here, but I hope we can provide some support. Question: The changes in the bone at L5-S1 look a little tricky -- do you have the radiology reports? If so, pls do share.
This reference on modic changes may be of interest in the future; in particular the section on the differential diagnosis.
The Modic Vertebral Endplate and Marrow Changes: Pathologic Significance and Relation to Low Back Pain and Segmental Instability of the Lumbar Spine