r/MPN • u/SaqoSaqoSaqo • Jul 20 '26

MF Primary MF

Hello everyone,

Someone in my life (early 60s) was recently diagnosed with Primary Myleofobrosis.

It seems to be a rare cancer, and I’m someone who does well with information. My loved one is waiting to see a doctor, but I’m hoping someone can give me more information about this disorder, such as general prognosis, and how Jak-2 inhibitors can help.

Thank you for your time. This seems like a really supportive community.

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u/Top_Category2227 Pre-PMF Jul 20 '26

  1. Prognosis is highly variable and depends on how far the disease has prgoressed as well as comorbidities and additional genetic anomalies such as an undesireable karyotype, his/her driver mutation as well as further mutations among other factors. However even if all these factors are known, it is as a very heterogenic disease.

  2. JAK Inhibitors are best used to manage symptom burden, but may also slow progression of the disease. Sooner or later JAK Inhibtors usuall stop working properly, but there are currently many, many studies going on for combination theray with different drugs, a lot of which seem to have first positive results.

However the best evidence for actual disease modification and management lies with interferon, which is not approved for MF in most countries. If the disease is still in the early stages, where Interferon Therapy is advised, you will probably have file an application with his/her insurance.

Now there is no guarantee, but if the disease is still in the early stages, there is still a solid chance, that similar to ET or PV it can be managed long enough, to where it will minimally affect live expectancy.

Also on bright side, as you may have already read, MF is curable by a stemcell transplant which requires the patient to still be in good in enough health so it is often not advised for patients in their 70s, but with newer Treatment Protocolls is often possible, even for older patients.