Your symptoms of “left hand and arm Pain and severe numbness for about 2 years now with loss of feeling in my 3 fingers, middle to pinky. When I look up I have a shocking pain so severe it feels like a hot poker is stabbing me in my chest and arm” sound to be a typical cervical radiculopathy, most likely a C7 nerve root.
This matches with your MRI; “At C6-7, there is disc osteophyte complex formation, with indentation of the ventral thecal sac. The central spinal canal is patent. There is moderate bilateral neural foraminal narrowing”.
The pain in your shoulder and arm increases with extension (bending your head backwards-“When I look up I have a shocking pain so severe”) due to the narrowing of the nerve hole (foramen) that occurs with extension. There is a light possibility of a C8 nerve compression (“C7-T1…mild bilateral neural foraminal narrowing”) but this is unlikely. A good physical examination would help to eliminate this possibility.
Artificial disc replacements (ADR) for the cervical spine are effective but if the disc is collapsed (highly narrowed due to disc degeneration), the ACDF is a better choice than an ADR. It depends upon the findings on X-ray including flexion/extension films and the condition of the facets on MRI. Also depends upon your sports involvement (impact, contact sports or sports with possibility of head impact) and occupation (not for jet pilots or NFL players).
Dr. Corenman
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.