JAK2 Mutation - Effects and Questions

i was taking a baby aspirin before the discovery of the jak2 mutation. my platelet count was normal for a long time. When the numbers started to elevate, finally a hematologist checked for this mutation, and sure enough i was positive for the Jak2. I only recently started on hydroxyuria (500mg). The platelet count has remained under 400 with this med. I had stopped taking the baby aspirin when I started the hydroxyuria, but now a new doc is recommending I add it. I'm trying to research whether this addition is necessary. Otherwise, the syndrome is in check. No side effects to report.

I was wondering about that. I donated also. Guess it's all over with PMF

I was dx 14 years ago. I have been taking 1000 mg of Hydrea everyday. My Feritin is 4 and my red cells and platelets are very high.
I have phlebotomies whenever I start to feel bad, other than that, I have been ok. I am always tired.
Not sure why my feritin is so low, but my dr. Has said that is normal.

Yes unfortunately that is true. For years after my mom passed from Myelofibrosis I donate to help replace the over 100 units of blood she had used the last 3 weeks of her life. But once I got my diagnosis of PV, I was told that they could not take my blood anymore. So disappointing. Today I am due for my routine blood draw and I have to watch them through it away.

An oncology nurse told me that blood withdrawn from people with blood disorders/cancers is discarded.

And the Red Cross, to which I had regularly donated for years, told me my ET diagnosis means I can no longer do so.

Thank you so much for your response. I plan on reading the articles you provided.
I appreciate your taking the time to respond to me.

Good luck

My brother and I have the JAK 2 mutation. I take 500 mg of Hydrea but my brother had more servere side effects from Hydrea so his medication was switched. My blood platelet count is in the high normal range but my brother's is still a bit too high.
My hematologist at University of Chicago Cancer and Blood Institue in Hinsdale, IL, kept repeating to me, "This is not cancer" over and over and over. Guess she knew how concerned I happened to be. I will take her word regarding essential thrombocythosis due to her vast experience. Yes, I was told I could have a heart attack or a stroke also so the Hydrea I will take for life, I suppose. I am thankful for that medication.

Thank you for responding. Most days are great and I feel fine. The probable I’m having is not knowing whether symptoms are related to PV or perimenopause. My most frequent issues are achy joints. I’ve only been doing the blood letting and aspirin. I’ve have also experienced anemia throughout my life. When I was first diagnosed my ferritin was only 8.

Good questions. I’m not a medical doctor. My career was at the diagnostic end (lab). Therefore, I can’t comment on treatment except from my own experience.
I initially was misdiagnosed as having Polycythemia Vera based on having a JAK2 mutation. At the time I was in denial because I was anemic. Finally, I challenged my heme/onc doctor. Told her if this was PV with anemia that the two of us should publish it because I haven’t found any articles supporting this. She laughed and agreed. To get the correct diagnosis I had to have a bone marrow biopsy. Many other gene mutations in the myeloid series were studied, but the defining diagnosis came from the pathology lab. I had Primary myelofibrosis. Sometimes that is the only way to get an accurate diagnosis.
As to hydroxyurea, when I took it for my elevated platelets and white count; it did not lower my platelets. It dropped my white count and lowered my red count making me anemic. So no more hydroxyurea. There are other drugs approved to inhibit the JAK2. Once symptoms elevate I will consider them. As for now low dose aspirin is all I’m on.
As I understand, even with meds blood letting will still be necessary. Hang in there. At least we are aware. Be sure to let all of your other doctors know.

I have the same situation and my oncologist put me on hydroxyurea 500 mg a day. Within 2 weeks, my platelets dropped from 337 to 57. He has taken me off hydroxyurea and new blood tests in 2 weeks. I asked him your question and he told me that I am at high risk of blood clots because I have the Jak 2 and the drug helps protect me from that. Does anyone have any other information?