There are known complications of all spine surgery. The risks are the same with transforaminal endoscopic decompression surgery. There are other risks not recognized by the traditional surgeons who accept post-op dysesthesia, numbness and motor weakness as unexplained or a known risk of the procedure. These risks include anomalous peripheral sensory and motor nerves, sympathetic nerves and furcal nerves.
These nerves in the foramen and epidural space can be visualized by the endoscope directly or indirectly as demonstrated by these videos. Often they are visualized during or after extraction of disc fragments where the nerves are adherent to the fragment.