Hi. I'm going in for surgery too. I had DCIS and it was invasive. Large tumor, 9 cm, is gone thanks to 6 rounds of chemotherapy - tchp. Even though the tumor is gone, and no sign of cancer anywhere else, my team recommnends mastectomy of that breast. Right breast is fine. Both my sisters had breast cancer. Also, there are microcalcifications in my left breast. So they add up the probabilities of recurrence and say it's extremely high. So off it goes. I have not been given much prep for surgery. I asked the surgeon and he kept looking at his watch. I do know that there will be 2 surgeons in the OR with me. They have to snip away all the strings attaching the breast to the body and then they remove the breast in one go. Sew me up and move me to post op recovery room and then overnight in hospital one night. Then home with a drainage tube attached to my left chest which I have to empty and measure and chart every day. I will use a shower chair to shower. I go back for follow up one week after surgery and hopefully they will take out the drainage tube. Then go back a week after that. Then 4 weeks recovery where I shouldn't lift anything more than 10 pounds and I shouldn't reach for things. Walking is recommended. They will give me a prescription for oxycodone to go home with but not very much. Surgeon recommends OTC painkills alternating between the two. Good Luck to you, to me, and to us all.