%0 Case Reports
%T Severe B12 Deficiency Causing a Maturation Defect Mimicking Myelodysplastic Syndrome With Excess Blasts.
%A Mecham B
%A Drissi W
%A Brummell G
%A Dadi N
%A Martin DE
%J Cureus
%V 16
%N 5
%D 2024 May
%M 38910768
暂无%R 10.7759/cureus.60837
%X Vitamin B12 deficiency is a common condition that is often asymptomatic, though in severe cases may cause megaloblastic anemia and even neurologic symptoms. Occasionally, the clinical presentation can include pancytopenia and thus mimic a more concerning myelodysplastic syndrome (MDS) until corrected by B12 supplementation. In this unusual case, we present a patient with B12 deficiency who presents with severe macrocytic anemia, neutropenia, lymphocytosis, and a bone marrow morphology consistent with MDS.