First of all I'm very sorry that you and your husband have such saddness, it stinks it truly does.
Yes, it can go into remission. My sister (read Sheryl555, that's me) was diagnosed almost three years ago with Stage IV non small cell double lung cancer, that went to the nodes. She is now in remission for the second time within that three year period. She has been in remission this time since April, she is a paralegal and works full time and has never stopped working the whole duration! Right now she feels great, she gets a little tired, but don't we all. We recently went to her doctor, last week and the doctor told her she's still in remission. He said believe me it is nothing I have done, it is prayer. And believe me, I know it is, that and her very positive attitude. Right from the begining she said she would not let this cancer beat her, she's only 44! Never give up hope or prayer. Every case is different, every person is different. But I truly believe in the power of prayer and attitude.
Good Luck to the both of you and hang in there. I will keep you both in my prayers.