For invasive ductal carcinoma with micropapillary features s/p lumpectomy, is bolus needed when treated with adjuvant whole-breast RT?

When using WBI, I don't typically bolus tangential fields. If superficial cavity and you are concerned about dose to cavity, I try to use 6 MV photons for tangents. For very superficial cavities, if you want to be sure, you can MOSFET over lumpectomy incision and if low, can add bolus over the incis...