The presence of what poikilocyte would lead to a suspicion of myelophthisic anemia rather than pure red cell aplasia?

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Dacrocytes, or teardrop cells, can indicate myelophthisic anemia, in which the bone marrow is replaced by tumor cells or fibrosis. Pure red cell aplasia, on the other hand, is characterized by a lack of red blood cell production in the bone marrow without infiltration of the marrow by other cells. The presence of other poikilocytes such as drepanocytes, schistocytes, or stomatocytes is not specific to either type of anemia.

The Presence of What Poikilocyte Would Lead to a Suspicion