Yes, a D&C makes a lot of sense. It won't allow anything to grow more freely, all they are doing is scraping the surface inside your uterus. It is a very, very common procedure.
Usually, though, this is done to determine if there is cancer present, so I'm not sure what purpose this will do with the cancer that is there. They may be doing this to make sure you don't have endometrial or uterine cancer. This seems like a good sign because usually you are given a hysterectomy for uterine or endometrial cancer in early stages.
Have they talked about a hysterectomy, chemo and/or radiation with you yet? What stage are you in? You need to get going on this and get this information ASAP. You have to take care of this stuff immediately and be your own advocate. This isn't the time to do a wait and see.
Me: 42/H: 37 T: 10 years/M: 8 D9, S8 Bomb: 7.23.07 Separated: 1.20.08 D Final 3.19.09 Affair started in '05, found out parts in 11/07. They married 11.26.09