02/06/2026
Options matter in chronic, rare blood cancers like myeloproliferative neoplasms (MPNs). When disease status or life circumstances change, having more than one path helps a care team personalize treatment instead of relying on a single approach.
Recently, the National Comprehensive Cancer Network (NCCN) announced an important update to its MPN clinical practice guidelines that affects people living with essential thrombocythemia (ET). The NCCN is a nonprofit alliance of leading cancer centers that develops widely used, evidence-based treatment guidelines. Doctors rely on these guidelines for day-to-day treatment decisions, and many insurers use them when they decide which treatments to cover.
In this update, the guidelines now name ropeginterferon alfa 2b njft (Besremi®) as a category 1 preferred treatment option for high-risk ET when:
👉 a person has not responded well enough to platelet lowering treatments
👉 their response to platelet lowering treatments has diminished over time
The FDA is still investigating and reviewing the use of ropeginterferon alfa 2b njft in ET. But the NCCN’s decision reflects strong clinical evidence and expert agreement that some people with ET may benefit from this option.
Interferon treatment is not new. It already plays a role in treating polycythemia vera (PV), another MPN. The new 2026 MPN guidelines give interferon a clearer and broader range of MPNs it may help treat.
This evolution in guidance shows how much we still need to learn about the biology within and between MPNs. The expansion of interferon use from PV to include ET reflects shared disease mechanisms across these related conditions and shows how existing treatments can support more personalized care as science advances. At MPN Research Foundation, we see this as a powerful example of careful research opening up more tailored options for people living with rare blood cancers.
If you live with an MPN, care for someone who does, or support MPN research, we invite you to follow MPN Research Foundation. Stay connected to guideline changes, new data, and opportunities to join a community that pushes for better options for people with essential thrombocythemia and other MPNs. https://f.mtr.cool/gfbtcsybis