Is it common to have to have drain in when you have your tissue expander's replaced with silicone gel implants.? I had bilateral mastectomy's with tissue expander's February 24, 2015. Today June 22, 2015 I had the tissue expander's removed, permanent gel implants placed, some grafting done. I was never told that I would need bilateral drains again is this common, it was never discussed with me was rather shocking to see them.