Lindy,
If it was my Husband I would request a cat-scan of the stomach.. My Dad stomach was swollen and it was the Cancer, I'm not saying thats what going on with your Husband but be safe and not sorry.. My Mother, My sister and myself keeping beating ourselves up over the fact that my Dads stomach was so swollen and we thought it was the steroids.. Maybe just maybe he would have had a chance if we didn't wait.. So play it safe!
Michele