Poikilocytosis is a general term that describes the presence of abnormally shaped red blood cells. It is not a specific disease, but rather a sign of a variety of conditions that can affect red blood cell production and maturation.

Some examples of poikilocytosis include:

* Spherocytosis: Red blood cells are rounder than normal.

* Elliptocytosis: Red blood cells are oval-shaped.

* Acanthocytosis: Red blood cells have irregular projections or spikes.

* Target cells: Red blood cells have a bullseye-like appearance.

* Schistocytes: Red blood cells are fragmented.

It is important to note that poikilocytosis itself does not indicate a specific diagnosis. Further investigation is needed to determine the underlying cause.