Serum B12 deficiency is a known sequlae of enterocystoplasty.
The complications of B12 deficiency
include megaloblastic anemia, neuropsychiatric
disease, and demyelinating diseases such as peripheral
neuropathy. Some studies have suggested
that underlying disease states may be more important
than enteric absorptive capacity in predicting
acquired B12 deficiency. A 38% incidence of low or
low-normal serum B12 in patients who have undergone
enterocystoplasty has previously been reported,
and oral B12 supplementation has been
demonstrated to be an effective short-term therapy;
however, the long-term results remain unclear.