Yesterday we started anemia, particularly the iron, B12, and folate deficiencies. It reminded me of a patient I saw last year who had a very confusing constellation of symptoms, but which I now realize were all anemia caused by a rash that had appeared on his chest 3 years earlier. The rash contained, presumably, rapidly proliferating skin cells and immune cells, which would suck of the folate and B12, both of which are involved in DNA synthesis. This was compounded by the patient's poor eating habit. Now if I could just figure out what the autoimmune condition was.
Something sort of similar is maybe in this paper.