Do all the patients with vitamin B12 deficiency have pernicious anemia?
Only 18.9% of patients with vitamin B12 deficiency are discovered to have PA by the WHO definition.
In this series, flow diversion for the treatment of MCAAs was safe, was effective in the treatment of fusiform MCAAs, and was not as effective at mid-term for MCA bifurcation aneurysms. Unsatisfactory occlusion rate in bifurcation aneurysms likely results from residual filling of the aneurysms in cases in which the jailed side branch remains patent.