Hi. Does anyone know how long EC chemo is effective for, i.e. how long before secondary breast cancer springs back to life? Mine is advanced, in liver, spleen, peritoneum, ovaries (removed), bones - all of spine, ribs, pelvis, femurs, spots on skin, head, lumps in neck, in my eyelids. Whilst all is stable, the radiotherapy to eyelids didnt work, so im off SI (estemestane) hormone treatment, and facing EC chemo next week. Im wondering about my prognosis.