What Does A Painful Lump Under The Right Breast Indicate?

I have a small, palpable lump centered mid flank, directly below my right breast. It concerns me when, occassionally, sharp, burning pain radiates from the lump itself, very localized small area directly from the lump sight. Pain does not radiate, travel elsewhere. Ive been diagnosed with fatty liver with multiple benign liver cysts in past. No Dr. has pointed out correlation between that diagnosis, last year, with the aforementioned cyst i originally complained of in 2007. Because its palpable and painful, does that indicate surgical removal? I am breast cancer survivor; Stage IIB lumpectomy w/truncated 3 session chemo, completed RAD thrpy in 2006. Clear margins not achieved per UCSF lab second opinion, i.e. 0.01 margin, unlike 0.09 on original lab rpt, postop. Your opinion please? Thank you, Nan