Possibly: In advanced breast cancer the tumor burden is very high and the body is fighting a war (even without chemotherapy) and therefore fatigue may be a symptom. For less advanced disease chemotherapy may be the predominant cause of fatigue. Other factors such as anemia and malnutrition will also contribute.
Answered 9/10/2013
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Most of the time no.: Breast cancer frequently has no symptoms at all, which is why we have mammograms and breast self exams. Extensive disease such as metastases can cause fatigue. Fatigue can be due to many things not at all related to cancer.
Answered 6/16/2014
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