Pawn ball megakaryocytes

Q. Pawn ball megakaryocytes are characteristic of:

1.myelodysplastic syndrome.
2.idiopathic trombocytopenic purpura.
3.thrombotic thrombocytopenic purpura.
4.chloramphenicol toxicity.

ANSWER:

Ans : 1. MDS(myelodysplastic syndrome)
These are very small megakaryocytes.
Normally Megakaryocytes are very large and never seen in P/S.