EPO and pure red-cell aplasia: Thus, PRCA may present as a primary haematological disorder in the absence of any other disease or secondary to parvovirus infection, collagen vascular disease, leukaemia, lymphoma, other lymphoproliferative disorders, thymoma, solid tumors, treatment with recombinant human erythropoietin or other drugs, ABO-incompatible haematopoietic stem cell transplantation and pregnancy (Table 1) [5].