breast lump came back as a clear benign cyst with ill defined nodule. The sono tec. did not do my entire arm pit area , so she did not find lump under arm.
Usually, no. But, the lymph nodes under the arm can swell for reasons other than cancer. Infections can cause them to swell and breast lumps can sometimes be caused by infections. If you have both breat and armpit lumps, you should see a doctor right away to determine the cause.