6.1 Long Term Side Effects

​​Author: Dr. Nathalie Levasseur
Date of completion: April 2026
Date of next review: May 2027
 See Breast Clinical Care Pathway​


Long-term side effects may occur as a result of any part of management of breast cancer. Life-threatening late side effects are extremely rare, but many survivors of breast cancer experience side effects that can significantly affect their quality of life, both in the short and long-term. The type and severity of these side effects vary according, in part, to the type of therapy that have been given.
 
A number of late or chronic side effects are possible from chemotherapy, including early menopause, bone loss, chronic neuropathy, cognitive changes, congestive cardiomyopathy, and secondary leukemia. As a consequence of surgery and radiation, patients may experience long-term intermittent breast or chest wall pain, shoulder pain and reduced range of motion, lymphedema, lung fibrosis, rib fracture, second malignancy of the irradiated area and chest wall/axillary dysesthesia. Endocrine therapy can be associated with hot flashes, vaginal dryness or atrophy, depression, postmenopausal bone loss, joint pain, and hyperlipidemia. 
 
There can be great value to detecting these side effects, as some may be amenable to therapeutic intervention if particularly symptomatic. Discussion of management of post-menopausal symptoms, lymphedem​a, and osteoporosis​ are discussed below. ​