23 Filippakis Filippakis GM GM Georgiadou Georgiadou D D Pararas Pararas N N Lanitis Lanitis S S Zografos Zografos G G Synchronous bilateral breast cancer with different biological profile and estrogen-progesterone receptor status Synchronous bilateral breast cancer with different biological profile and estrogen-progesterone receptor status 12 Breast J. 12 Breast J. 2008 2008 14 14 2 2 209 209 10 10 18298610 18298610. The gene discussed is PGR; the disease is breast cancer.