Accuracy of DEXA Scans
I am guessing that I am not the only one facing a medication decision based on one DEXA scan with no fractures. That raises the question as to how much reliance we should put on that single measurement. I trust that sites calibrate the instruments according to the manufacturer's specifications. But we read about the importance of proper positioning. I was only asked to lie on a table with no special consideration of position. Does improper position make bones appear denser or less dense? Or is the effect minimal?
Remember the old weight charts that had ideal weight ranges by height and bone structure? Does DEXA factor in bone structure when calculating density. Obviously, there is less bone for the x-rays to penetrate for a fine-boned person than for a heavy-boned one. That could be interpreted has having less bone mineral density which may not be the case.
Any insight or other pertinent questions?
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Thanks. How would anyone know that? Appreciate the reply.
@rola your spine is slightly worse than hip, though the difference is probably not clinically significant. Tymlos is good for spine. You could do Tymlos for two years and by that time it may be more mainstream to do Evenity afterward. I had to convince my doc.
My idea was to do Evenity for just a few months, when it is a strong bone builder and before it becomes more of an anti-resorptive, so I wanted to do it after Tymlos, do a few months, then switch to Reclast. My doc told me I am creating my own protocol. Luckily both my endos don't mind but I am kind of a special case with lots of fractures and several health conditions and sensitivities.
Anyway I recently read something interesting: that in the future short courses of Evenity might be used to build bone, between other meds. That is kind of what I had in mind.
Tymlos is not an anti-resorptive and builds quality bone. That is why I chose it. Evenity is both an anabolic (first half) and anti-resorptive (second half). My reasoning, not yet checked with doc, is that if I am going to do an anti-resorptive after Tymlos it might as well be Reclast, which "locks in gains." So I will stop Evenity and switch at some point. Yes this is unusual. Yes my doc has not prescribed this protocol as yet. This strategy is more appealing to me because I am having side effects with Evenity, and I will ask to switch to Reclast on that basis alone.
The science of all this is very complex and I am not trained to interpret studies, though I read them. I want to emphasize that everything I do is obviously sanctioned by docs, since they prescribe, and that I discuss things fully with them. In other words I am not a rogue patient but probably a difficult one!
triciaot,
Could you say more about why you’re choosing Reclast? I will be starting Reclast in May.
windyshores if you see clinical trial results come out for short courses of evenity between other meds, please share. Thanks a lot!
Reclast was suggested by my endocrinologist. This was before I was diagnosed with BC. I’ve had osteopenia for years and avoided meds, but finally took Fosamax/alendronate after I moved to another city, dropped down into osteoporosis, changed my PCP doctor- and was convinced by her that I needed to see an endocrinologist about my bones. Fosamax (that first line med that insurance companies love) caused some minor stomach irritation, some diarrhea . . .and conjunctivitis, a lesser known side effect but evidently one that is important.
The endo then recommended the Reclast, we didn’t discuss bone builders. Maybe because my numbers were mostly still osteopenia with two areas in osteoporosis? Not sure. It seems a life time of decisions ago.
Before I could get the infusion scheduled, I was diagnosed with BC. I now have an MD Anderson rheumatologist following me. He agreed that Reclast was a good solution and would help protect my bones in case I have a cancer recurrence that is invasive and possibly metastatic.
@windyshores
Windy, thank you so much,! I have so much more faith in you than the Drs I've seen. So to be safe I'll do the tymlos, then hope we have more information to work with in 2 yrs. I appreciate you so much, it's all so involved. If it weren't for you and connect I'd be lost. I know I'll feel better finally just doing it.
Usually it asks for the Femoral Neck
Here's a link to the article I quoted, from 2015.
The drugs mentioned are bisphosphonates, Denosumab (Prolia) and strontium ranelate. https://www.bmj.com/bmj/section-pdf/897225?path=/bmj/350/8010/Analysis.full.pdf
There is also a movement questioning whether the treatments for cancer are being overdone. Would a slightly smaller dosage produce the same results but in a more tolerable manner.
@mayblin it wasn't a study. It was speculation in an interesting article. If I find it I'll share it.
@rola those are nice words but I hope you find a doctor you trust. They know way way more than I do. I just post on my own experience and share resources!