Posey, thanks for the detailed reply.
Something to ponder. Is it possible that the reason why you don't bruise with counts less than 10 is the same reason why you have migraines (looking through old posts)? Assuming for a moment that the migraines are tiny capillary blocks in the brain.
It is that sort of the pondering which prompted me to ask you about consuming things that interfere with platelet function. That is, would a little bit of fish during the week reduce migraines?
Your 25mg response to Promacta, and, your stable response is interesting. Now, even more interesting, is that you have allergies with the stable response. Looking through PDSA historical recounts, folks with GPIIb-IIIa platelet antibodies (most common) have a strong response to steroids - a response which then swings wildly when on steroids. Apparently the swings are do to allergies. Then, when they get on Promacta, will again have wild response swings.
How to explain you having allergies while also having a stable response? It seems to me that the reason for this, and your 25 mg Promacta response is because you have TPO antibodies, which I believe I have as well. To explain the Promacta response, think about two different ITP cases. One (1) where platelets are destroyed in the spleen - a platelet destruction problem. Another (2) where TPO is destroyed in the spleen - a platelet production problem.
Consider what happens when each of these patient types go on Promacta. In the first case a large dose is required to overcome the platelet destruction. The more the destruction, the higher the dose. In the second case there is no platelet destruction to overcome. The problem is there is no/little TPO arriving at the bone marrow to stimulate platelet production. Only a small dose of Promacta is required - merely enough to replace the missing TPO - which was destroyed in the spleen. Does all this make sense?
This gaining and losing TPO response you mention is new for me. Don't know how to explain.Though, I have to wonder if it's possible (for someone with TPO antibodies) to take a drug when one looses response which will quickly restore the response. Steroids, Danazol, an immune suppressant?
You mention about bleeds that you don't have on low counts. During my search travails I may have come across a mention of a possible explanation. It was something about granules, or bits, or platelet bits, or granules of platelets. Something like that. It had a link in the post that I did not go to. I think it was a post by Sandi, not sure. 2010-2011 time frame. Perhaps you would start having a low count bleeding problem with a few meals of fish per week, LOL