It also predates 3D planning and lacks a stereotactic frame (lest someone invoke Leksell)why aren't you submitting 25/5 rectal as SBRT tho?
It also predates 3D planning and lacks a stereotactic frame (lest someone invoke Leksell)why aren't you submitting 25/5 rectal as SBRT tho?
I tried once and got denied by evercorewhy aren't you submitting 25/5 rectal as SBRT tho?
I tried once and got denied by evercore
I tried once and got denied by evercore
The same people that won't let you bill 3D for anything palliative, even if you contour at least 2 OARs and generate a dvh. Instead they pay you a "complex" code which is worth 3-4 figures less regardless of the work you actually didSame. Denied by Evilcore for this and 5-fraction breast. No rationale, just “we don’t consider it that”
I have no issue with it. Terrible Medicare advantage plan that I was told the hospital recieves 80-90% of Medicare. Thorought we deserved something for all the effort.Same. Denied by Evilcore for this and 5-fraction breast. No rationale, just “we don’t consider it that”
Yes. Thus far only had Medicare patients be APBI suitable candidates, but have a 50 something year old with private insurance I just simmed filled out pre-auth paperwork on. If I have to take IMRT x 5 fractions I will which is why I qualified as "only if insurance will allow"Have you submitted it as sbrt ?
Fair point. I would not routinely do that. Same reason as Simul, where it's not pinpoint to a small target. I did a 25/5 with SIB to 40/5 to gross external iliac lymph node (with allowed heterogeneity in the LN higher) which I did submit as SBRT. Didn't hear of any issues from billing on it.why aren't you submitting 25/5 rectal as SBRT tho?
What kind of setup are you doing for ABPI? Didn't see anything specific mentioned in the manuscript.To me it’s due the volume being treated. Maybe arbitrary but I think at that size I don’t think of it is sbrt - it’s not focused or pinpoint in any way. But that’s subjective
Supine, breast board, arms up, DIBH, cbct daily
Both. With the small margins, I think it helps. It’s what Chirag does, and if it works for him, then it works for me.DIBH for L sided only or both?
This is what I do minus the DIBH.
Both. With the small margins, I think it helps. It’s what Chirag does, and if it works for him, then it works for me.
"Require" your surgeons to put clips in. Hah. That's funny. The surgeons I work with refuse to do it. So I wire the scar, contour the seroma, and am more generous with the contouring and margins as needed. I've got one right now that's about half the breast due to surgeon not putting in clips and a lot of uncertainty. Any bigger and I would not meet trial constraints and would go to fast-forward style approach if patient demanded 5 treatment, I agree.Weird that this is in the CCS oncology thread.
For those of you doing Livi APBI, do you require your surgeons to put clips in the lumpectomy cavity? We've been doing Fast Forward whole breast if no clips, Livi if clips
this makes sense to me"Require" your surgeons to put clips in. Hah. That's funny. The surgeons I work with refuse to do it. So I wire the scar, contour the seroma, and am more generous with the contouring and margins as needed. I've got one right now that's about half the breast due to surgeon not putting in clips and a lot of uncertainty. Any bigger and I would not meet trial constraints and would go to fast-forward style approach if patient demanded 5 treatment, I agree.
He uses much smaller margins. I think as we get out in practice, we can deviate from “exactly what study does” and make some leaps in logic.What Would Chirag Do is a very reasonable treatment strategy with breast cancers.
However, I don't think DIBH is actually necessary on all APBI cases. Don't see it mentioned in Livi paper as part of their set-up either...
DIBH in L-sided breast is primarily to separate heart from chest wall contour, which thus far all of mine have been (fortunately) not inferomedial left-sided tumor beds.
this makes sense to me
ultimately all the partial breast data compiled together shows us that we are and should be more than okay treating less than the whole breast tissue, skin, and fat.
past that, use however big margins you need to, based on the situation, any tissue getting avoided is better than no tissue getting avoided.
(also should make you feel better about skimping on whole breast RT when needed)
I have a hypothesis that you could treat essentially the whole breast to 30 Gy in 5 every other day, limit hotspot to 105%, and the patients would do fine.
At least with my experience treating breast volumes far larger than I otherwise would because the surgeons think the clips cause the patients post-operative pain, don't want to consent for a retained foreign body, or whatever other excuse they have given.
I would love to get a good argument going as to whether 26 Gy in 5 fractions partial breast is valid for all 50+ yos with T1N0 favorable risk breast cancer.I have a hypothesis that you could treat essentially the whole breast to 30 Gy in 5 every other day, limit hotspot to 105%, and the patients would do fine.
If you think they're going to die within the next 5 to 6 years, I think it's perfect.I would love to get a good argument going as to whether 26 Gy in 5 fractions partial breast is valid for all 50+ yos with T1N0 favorable risk breast cancer.
Huh ?If you think they're going to die within the next 5 to 6 years, I think it's perfect.
Just a standard breast is the worst response.Huh ?
tricky !Mine are case by case, but after doing about 50 cases last year (mostly in 65yo+) I've settled into mostly 7mm CTV 5mm PTV. If cavity is not as well defined I'll revert closer to the original paper.
Is there something I’m missing about 26/5 leading to death early or bad cosmetic outcomes ?Just a standard breast is the worst response.
He uses much smaller margins. I think as we get out in practice, we can deviate from “exactly what study does” and make some leaps in logic.
Like people were not doing HF because “whelan didn’t study dcis” which is silly. This forum has a lot of debate on that in the past, because ROs stick to NCCN guidelines or to the letter of the study without using common sense.
Yes, Livi did not do it. For me, his study is proof it can be done, and smart people like Chirag and the good people at The other centers can refine technique.
tricky !
I contour clips + seroma and add 2.5cm for PTV26 and 1.5cm for PTV30
It’s 2cm / 1 cm ctv, edit then 0.5cm for PTV then edit for PTVeval
26/5 was good enough for the whole breast. So, 30/5 is an automatic boost and we know cosmetic outcome is fine with it.Fair, although I feel comfortable shrinking margins even without DIBH. I'm not saying it's wrong to do DIBH, just not sure it's mandatory.
(Clips + Seroma) + 1cm to CTV, edit, then 0.5 for PTV, crop for PTV eval, which is PTV30.
I'm not sure of utility of adding additional volume going to 26Gy? If just preference then cool, but I wonder how much it would affect ability to get ipsi breast V15 < 50% or minimizing contralateral breast dose in certain anatomical scenarios?
I'm sure its not necessary. Its a patient by patient thing. My therapists will tell me in the wrong pt DIBH extends treatment time lots and their level of confidence in positioning over course of treatment is less than with free breathing. The protocol margins are are fine for me and falloff gives you an additional 3-4 mm to 26 Gy. The trial tells us what it tells us. That doing it a certain way works well with a low risk group and 10 year f/u.I'm not saying it's wrong to do DIBH, just not sure it's mandatory.
No, things look pretty much equivalent for 5 or 6 years, or at least probably no more than 33% worse.Is there something I’m missing about 26/5 leading to death early or bad cosmetic outcomes ?
Without clips, I use the original large margins, sometimes having to go bigger. Only difference is I don't expand PTV into lung and actually crop off chestwall a bit since I CBCT.I'm curious now as to what margins everyone is using here for 30/5 if this impacts the DIBH/non-DIBH argument
Mine are case by case, but after doing about 50 cases last year (mostly in 65yo+) I've settled into mostly 7mm CTV 5mm PTV. If cavity is not as well defined I'll revert closer to the original paper.
For the Fast study? That has 10 years follow up (weekly tx study).No, things look pretty much equivalent for 5 or 6 years, or at least probably no more than 33% worse.
Fast forward. I'm not doing 5 weeks of rt...For the Fast study? That has 10 years follow up (weekly tx study).
I guess it’s always fair to hold out for 10y data. The only time I remember a breast trial’s 5y results not holding up at 10y was the old Upfront Outback trial of chemo sequencing. Iirc at 5y there was a benefit to the adjuvant chemo before RT but at ten years the curves converged and the significances favoring chemo upfront went away. Yet still to this day chemo before RT the standard of care. You might get booted out of oncology if you try to give RT before adjuvant chemo.Livi also has 10 year data
its a case closed situation frankly.
Used to be ok with savi/mammosite, probably an argument to try and push with 5 fx as well, but there are some battles out there just not worth fightingI guess it’s always fair to hold out for 10y data. The only time I remember a breast trial’s 5y results not holding up at 10y was the old Upfront Outback trial of chemo sequencing. Iirc at 5y there was a benefit to the adjuvant chemo before RT but at ten years the curves converged and the significances favoring chemo upfront went away. Yet still to this day chemo before RT the standard of care. You might get booted out of oncology if you try to give RT before adjuvant chemo.
I want to say the ELIOT trial for breast **digging back into my residency pimping vault**I don’t know of any study where the question was strictly a radiation one where the results changed from 5 to 10 years.
It’s great. It’s my “de rigueur” in the older than 50, low risk crowd. They do not minimize its utility in the UK; one of their “red rose” trials and the basis of making 40/15 partial breast be their new 26/5 partial breast (and reason I wanted to start an argument about 26/5 partial breast). Hesitant to make all my 15fx be 5fx tho, as I don’t know how many breast cancer patients I can treat if I bankrupt my cancer center.40/15 partial breast seems like good option, too. Doesn’t seem to be used often. MedNet thread on it, and everyone seems to minimize its utility.
I'm sure its not necessary. Its a patient by patient thing. My therapists will tell me in the wrong pt DIBH extends treatment time lots and their level of confidence in positioning over course of treatment is less than with free breathing. The protocol margins are are fine for me and falloff gives you an additional 3-4 mm to 26 Gy. The trial tells us what it tells us. That doing it a certain way works well with a low risk group and 10 year f/u.
Also not sure CBCT necessary. Trial did both but with breast position you typically have to shift table to cbct and then shift back. Is this really better than orthogonal kvs in treatment position with well visualized clips? I don't know.
We used to do that all the time, until Livi long-term data became available.40/15 partial breast seems like good option, too. Doesn’t seem to be used often. MedNet thread on it, and everyone seems to minimize its utility.