I was just scouring the internet for answers on this question. None of my doctors really even know what I'm asking since they have no clue about the physiology of diving. I'm primarily trying to understand lymphedema since I had a meeting with a PT today (pre-double mastectomy; no radiation; no tamoxifen; no chemo). She happens to dive a bit (not as much as I do - I'm at 300 recreational dives in 8 years and I live in the mountains of Colorado...), and suggested I should just always wear a compression sleeve now whenever I fly or dive. Ugh. They will take one sentinel node. If they find more during my surgery, then I'll want to understand the risks associated with radiation and chemo.
But my main thought here is that the DAN articles I've read are all the same and most are quite old and fairily generic. I wonder if DAN could be interested in exploring the subject further and more in depth than they did in the mid-2000s when the initial recycled article seems to have been published? I have the impression that many women who have had breast cancer treatments are diving again. And ALL of us have to be concerned about lymphedema down the line.
And all the best to the OP - I hope you are back to diving now.