"Seventy-Three-Year-Old Man with Pernicious Anemia Complicated by
Subacute Combined Spinal Cord Degeneration and Cognitive Impairment"
ndmc.ac.jp/wp-content/uploa...
His serum B12 was 88 and MCV was elevated for quite some time - his case really shouldn't have gotten to the point it did - a clear failure of primary care here. This wasn't even a complex case, for example lacking anaemia or a functional deficiency, so there seems really no excuse for not catching that via a regular B12 serum downtrend over time along with MCV.
If GP's cannot even catch the most clear and straighforward cases before SACD occurs, what chance to catch those with more subtle dysfunctions