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Is it normal for platelets to fluctuate, went from 619 to 500 in 5 weeks, newly diagnosed with ET and Jak2, only taking aspirin

A myMPNteam Member asked a question 💭
Toronto, ON
December 13, 2025
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A myMPNteam Member

I’d double check with your doctor. Hopefully you are seeing someone who understands MPNs. I had a follow up with my hematologist (I live in Canada). I always learn something from her as I’m trying to understand what the various parts of a complete blood count means and how taken as a whole, what is the impact. My hematocrit is just one part.

December 13, 2025
A myMPNteam Member

Trombosit sayılarındaki bu deyerler Esansiyel Trombositoz (ET) seyrinde klinik olarak beklenen bir durumdur. Trombosit değerleri; hidrasyon durumu, inflamasyon veya laboratuvar varyasyonlarına bağlı olarak anlık değişimler gösterebilir.
Sadece aspirin (antiagregan) tedavisi alırken görülen 619'dan 500'e olan düşüş, genellikle bir risk artışı teşkil etmez. Önemli olan tekil bir sonuçtan ziyade, değerlerin uzun vadeli trendidir. JAK2 pozitifliği nedeniyle pıhtılaşma riskine karşı aspirin kullanımına devam etmeniz ve bu trendi bir sonraki kontrolünüzde hematoloğunuzla paylaşmanız yeterli olacaktır."

January 8 (edited)
myMPNteam

Is it normal for platelet counts to fluctuate with essential thrombocythemia (ET)?

Yes, platelet fluctuations can happen with ET. A drop from 619 to 500 over five weeks shows your platelets are decreasing, which is actually moving in a positive direction.

Since you're newly diagnosed and only taking aspirin, this change Show Full Answer

Is it normal for platelet counts to fluctuate with essential thrombocythemia (ET)?

Yes, platelet fluctuations can happen with ET. A drop from 619 to 500 over five weeks shows your platelets are decreasing, which is actually moving in a positive direction.

Since you're newly diagnosed and only taking aspirin, this change might reflect your body's natural variation or early response to treatment. Aspirin helps prevent blood clots but doesn't typically lower platelet counts significantly on its own.

What matters most isn't just the platelet number itself, but your risk of complications and symptoms. Doctors focus more on:

* Your age
* History of blood clots
* Presence of JAK2 mutation (which you have)
* Any symptoms you're experiencing

Having a JAK2 mutation can increase your risk for blood clot complications. Your healthcare team will monitor your platelet levels and symptoms to determine if you need additional treatments beyond aspirin.

Many people with ET live normally with elevated platelet counts, especially if they're at lower risk for complications. Your doctor will continue tracking your numbers and adjust your treatment plan as needed.

Keep attending your regular appointments so your hematologist can monitor these fluctuations and ensure you're receiving the right level of care.

December 13, 2025

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