Just saying, "You have a JAK2 V617F is not enough! In my opinion and many oncologists' opinions, diagnosing to be sure you have ET can only be 100% accurate if you have the BMB! It can tell a hematologist/oncologist much more than blood tests alone. I would definitely ask to have one done when you see the UCLA! Bleeding can be caused by several things -- very high platelet count, which crowds out other blood cells, very low platelets, etc. This is why you need a BMB to see exactly what else is going on and get a "baseline" of all your important cell counts.

I am so glad you'll be seeing a specialist at UCLA soon! PLEASE have them order a CT guided BMB for you while you are there!