No other explanation but "crumbling"? The only thing I can think he might be meaning is that the MRI showed degeneration of the discs? Or osteoporosis? HAve you either of these?
A spine specialist is a great idea...especially for a consult. It will probably be a surgeon, a neurosurgeon. If you seek one, you can always get more than one opinion. Some docs get a little "scalpel happy" and are quick to rush you into sugery. So yes, a spine specialist is needed, but be sure that you trust him/her and feel comfortable. There are hospitals around the nation dedicated to spine surgeries and spinal health...might be worth looking into.
Are you in a lot of pain?
Good to hear from you Carolfer, the best to you.
Write back soon.