(a)
(b)
(c)
(d)
Figure 1: Bone marrow biopsy (a) at diagnosis of acute myeloid leukemia (AML) demonstrating infiltration by myeloblasts; (b) after one course of AML therapy showing atypical megakaryocyte morphology and focal clustering; (c) at diagnosis of myeloproliferative neoplasm (MPN) with myeloid hypercellularity and increased megakaryocytes; and (d) at diagnosis of MPN demonstrating increased reticulin deposition.