How do you decide treatment volumes for radiotherapy for bilateral gynecomastia secondary to bicalutamide therapy?

I recall treating more of these cases in prostate cancer patients in the earlier period of my career when DES and flutamide was used more often. And I don't recall having to re-treat anyone.

We did both therapeutic and prophylactic RT -> with the latter we/some use 8-10Gy x1(http://www.nice.org.uk/c...

If using a clinical electron setup, the most common setup seen in the literature is an 8x8cm field centered on the breast bud. As for depth, I’m sure that was clinician dependent.