Tethered Spinal Cord Syndrome, also known as Tethered Cord, is something I have recently become aware of. Below is some research I found on the subject.
First we have a video from Holly S. Glimer, MD, Associate Professor, Department of Neurosurgery, Oakland University, William Beaumont School of Medicine, published on YouTube.com on April 22, 2013:
Dr. Glimer speaks of a subtle, or minimal tethered cord, as opposed to the classic tethered cord. With these cases she says there is no low lying or pulled down cord, but rather the cord is “pulled back.” She also mentions the filum being thicker.
I will put more information below as I continue researching this subject.