[ RANKL antibody for treatment of cancer treatment-induced bone loss (CTIBL)]

Treatment for cancer may cause gonadal dysfunction and bone loss (cancer treatment-induced bone loss ; CTIBL) . Especially, endocrine therapies for breast cancer or prostate cancer carry a significant risk of CTIBL. Therapy-induced premature menopause in premenopausal breast cancer patients, aromatase inhibitor in postmenopausal breast cancer patients, and LHRH agonist with or without anti-androgen in prostate cancer patients may cause bone loss of 5% or more. RANKL (receptor activator of nuclear factor-κB ligand) antibody (denosumab) is effective for prevention of CTIBL and it may prevent CTIBL-induced fracture. During cancer treatment with gonadal dysfunction, bone mineral density should be carefully followed to avoid QOL impairment due to osoteoporosis.