There are several other reasonable standard chemotherapy regimens for gastric cancer besides ECF. I am sure your oncologist knows them. There are also clinical trials to be tried.
Perhaps your husband's oncologist feels that temporarily, your husband is not strong enough for any chemotherapy. If the oncologist was giving up for good, your husband would have been referred to hospice.
During this break from chemotherapy, do you think your husband is well enough to fly somewhere for a second opinion?
At the very least, you would get peace of mind that all that could be done is being done if the second opinion agrees with the current plan.
Tough cases like your husbands are often referred to top places. These places see many more of these tough cases in a week than most oncologists see in a lifetime. They have more experience with more treatment regimens including the latest newest ones that have not yet made their way to local oncologists.
Many people who had been given death sentences by their local doctors have been put in remission or cured by such top centers. Where a person goes to get treatment does make a difference. At least go and hear what they have to say. If you go to the link below there are links to each place and each web site has phone numbers you can call to make an appointment.
TOP 50 BEST *CANCER* CENTERS 2006
http://www.usnews.com/usnews/health/best-hospitals/rankings/ 1. Memorial Sloan - Kettering Cancer Center, New York
2. University of Texas M. D. Anderson Cancer Center, Houston
3. Johns Hopkins Hospital, Baltimore
4. Mayo Clinic, Rochester, Minn.
5. Dana - Farber Cancer Institute, Boston
6. University of Washington Medical Center, Seattle
7. Duke University Medical Center, Durham, N.C.
8. University of Chicago Hospitals
9. UCLA Medical Center, Los Angeles
10. University of California, San Francisco Medical Center