Sometimes if you have B12 malabsorption you can also gave copper deficiency. Can you ask your doctor for a copper level and a caeruloplasmin level? The symptoms of copper deficiency are the same as sub acute combined degeneration from B12 deficiency. If you gave both deficiencies together they can interact and cause a lot of problems. I have had both and even though I have treatment and I'm no longer deficient, I have been left permanently disabled because it wasn't diagnosed early enough.