This may be apples/oranges but I've had stem cell treatments for torn Achilles tendons. I tore both during a 50 mile race. One heel had successful prolotherapy treatment. The other had it as well but it never healed so the next step was stem cells. As the OP mentioned, marrow is extracted from the hip. Then it was injected into the Achilles. I had the treatment nine weeks ago. It seems to be healing the tendon. At its worst the insertion on the heel was larger than a chicken egg, not allowing me to wear shoes and too painful for walking, much less running. The swelling is 90% gone in the insertion and I'm back to running.
BTW, marrow extraction was horrifically painful. Three nurses had to hold me down while marrow was being sucked out of my hip bone. In comparison, injecting the marrow into several spots along the heel/tendon was nothing even though for each injection the needle had to hit bone.
kpo
Thanks for this report. So it's quite clear to me at this point that recent innovations in bone marrow mining (finer needles, improved marrow miners, etc.) have mitigated the pain to well within manageable limits, given appropriate local anaesthetic. But not all stem cell centers use these improved techniques, hence your unfortunate experience.
Now as to the success of your treatment, it looks like this is yet another case of bone marrow (in this case, whole bone marrow) mediating connective tissue repair. That said, your case is distinctly different than mine in that the target of the therapy is not sufficiently accessible from the circulatory system, hence the need to perform direct localized injections. This resulted in a huge bone marrow bolus which definitely should not have occurred, had it instead been dripped into circulation intravenously.
Care to say where you got the therapy, cost, or anything else about your specific situation? For that matter, anyone else is invited to post their stem cell experience in this thread, especially if it involves quantitative data or other useful tidbits like the name of the center, the cost, weird side effects, etc. Because after all, I'm not the only guinea pig