Stomach cancer in children accounts for only 0.11 percent of all gastric cancers in the Unites States, so little data is available about treatment outcomes and survival rates, explains the National Cancer Institute. However, as of 2015, stomach cancer accounts for about 10,720 adult deaths each year, according to the American Society of Clinical Oncology. If children succumb at about the same rate as adults, this places the number of childhood deaths from stomach cancer at about 12 per year.
Doctors at MD Anderson Cancer Center treated five pediatric patients with stomach cancer between 1990 and 2008, according to a 2011 article published on PubMed. The patients ranged in age from 8 to 17 years, and four of the five had cancer that had spread to other sites at the time of diagnosis. Doctors treated the children with a variety of anti-cancer medicines, but the disease progressed within a period of two to seven months. Within another one to five months, all but one of the children had died. The surviving child, whose disease was localized at the time doctors discovered the disease, was still alive 8 1/2 years after treatment began. These long-term outcomes are consistent with the outcomes seen in adults.