Dear helpfriend,
I'm sorry to hear of your friend's mother's diagnosis. I am an employee of Memorial Sloan-Kettering Cancer Center and came across your post for recommendations on the best place to get treatment for stomach cancer.
I would recommend that she start with the National Cancer Institute's web site, which offers cancer patients and their families a searchable database of cancer centers by location, type of center, or keyword. The database contains contact information and descriptions of the different types of NCI-designated cancer centers, which are recognized for their excellence and experience in cancer research, prevention, diagnosis, and treatment. Here is the link: http://cancercenters.cancer.gov/cancer_centers/cancer-center
Memorial Sloan-Kettering is one of NCI's designated comprehensive cancer centers. Here’s a link to some information about stomach cancer treatment here: http://www.mskcc.org/mskcc/html/6055.cfm
I hope this information is helpful and wish your friend's mom the best of luck as she determines where is the best place for her to receive care. -Esther