PBI in N1mi (actual radiation question)

We should have a sub-forum where we ask radiation questions... Have a lady with a RUOQ T1N1mi ER/PR+ breast cancer s/p lumpectomy and SLNB with microscopic disease in the SLN. She has lupus with some mild cutaneous manifestations on plaquenil. She doesn't want mastectomy, and have discussed risks. The cavity with margin and level 1/2 could be treated pretty conveniently instead of WBRT, sparing a ton of tissue. Was wondering if this sounds reasonable in this setting.
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: Radiation Oncology Source Type: forums