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Rock singer Melissa Etheridge discovered a lump in her breast in October 2004. She was later diagnosed with stage two breast cancer. Cancer cells were found in the tumor as well as inside one lymph node.
Etheridge had a lumpectomy, underwent chemotherapy and radiation and had all 15 lymph nodes removed.
(Pictured: Melissa Etheridge receives a star on the Hollywood Walk of Fame on Sept. 27, 2011.)