{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,15]],"date-time":"2026-10-15T03:06:31Z","timestamp":1792033591031,"version":"4.4.0"},"reference-count":144,"publisher":"S. Karger AG","issue":"1","license":[{"start":{"date-parts":[[2023,5,11]],"date-time":"2023-05-11T00:00:00Z","timestamp":1683763200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"},{"start":{"date-parts":[[2023,5,11]],"date-time":"2023-05-11T00:00:00Z","timestamp":1683763200000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Pathobiology"],"published-print":{"date-parts":[[2024]]},"abstract":"<jats:p>Disease progression in myelodysplastic syndromes (MDS), myelodysplastic-myeloproliferative neoplasms (MDS\/MPN), and myeloproliferative neoplasms (MPN), altogether referred to as myeloid neoplasms (MN), is a major source of mortality. Apart from transformation to acute myeloid leukemia, the clinical progression of MN is mostly due to the overgrowth of pre-existing hematopoiesis by the MN without an additional transforming event. Still, MN may evolve along other recurrent yet less well-known scenarios: (1) acquisition of MPN features in MDS or (2) MDS features in MPN, (3) progressive myelofibrosis (MF), (4) acquisition of chronic myelomonocytic leukemia (CMML)-like characteristics in MPN or MDS, (5) development of myeloid sarcoma (MS), (6) lymphoblastic (LB) transformation, (7) histiocytic\/dendritic outgrowths. These MN-transformation types exhibit a propensity for extramedullary sites (e.g., skin, lymph nodes, liver), highlighting the importance of lesional biopsies in diagnosis. Gain of distinct mutations\/mutational patterns seems to be causative or at least accompanying several of the above-mentioned scenarios. MDS developing MPN features often acquire MPN driver mutations (usually &lt;i&gt;JAK2&lt;\/i&gt;), and MF. Conversely, MPN gaining MDS features develop, e.g., &lt;i&gt;ASXL1&lt;\/i&gt;, &lt;i&gt;IDH1\/2&lt;\/i&gt;, &lt;i&gt;SF3B1&lt;\/i&gt;, and\/or &lt;i&gt;SRSF2&lt;\/i&gt; mutations. Mutations of &lt;i&gt;RAS-&lt;\/i&gt;genes are often detected in CMML-like MPN progression. MS ex MN is characterized by complex karyotypes, &lt;i&gt;FLT3&lt;\/i&gt; and\/or &lt;i&gt;NPM1&lt;\/i&gt; mutations, and often monoblastic phenotype. MN with LB transformation is associated with secondary genetic events linked to lineage reprogramming leading to the deregulation of ETV6, IKZF1, PAX5, PU.1, and RUNX1. Finally, the acquisition of MAPK-pathway gene mutations may shape MN toward histiocytic differentiation. Awareness of all these less well-known MN-progression types is important to guide optimal individual patient management.<\/jats:p>","DOI":"10.1159\/000530940","type":"journal-article","created":{"date-parts":[[2023,12,20]],"date-time":"2023-12-20T09:55:21Z","timestamp":1703066121000},"page":"55-75","source":"Crossref","is-referenced-by-count":20,"title":["Progression in Myeloid Neoplasms: Beyond the 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