LGALS3BP and breast cancer: 90K/Mac-2 BP (Mac-2-binding protein), also known as 90K, lectin galactoside-binding soluble 3-binding protein (LGALS3BP) or Galectin-3 binding protein (Gal-3BP), is a N-glycoprotein (PM 70–95 kDa), originally described as a circulating antigen in the supernatant of human breast cancer cells [39].