Stomach cancer, once thought to be in steady decline, is now showing a worrying upward trend among people under 50 in both the UK and the US. Doctors and charities report an increase in diagnoses for this age group, a reversal of a decades-long decline attributed to improved hygiene, diet, and reduced smoking rates.
Historically, stomach cancer was a leading cause of cancer death in the late 19th century. However, from the mid-20th century, rates dropped significantly. This decline was largely due to the reduced prevalence of Helicobacter pylori infections, improvements in food preservation replacing salted and smoked foods, and a decrease in smoking. These factors led to an over 80 percent reduction in death rates since the 1970s.
A Shift in Demographics
Specialists are observing a marked shift, with an increasing percentage of patients being diagnosed at younger ages. "Big NHS cancer hospitals are now setting up specialist units to deal with the rise in young people with stomach cancer," stated Sheena Dewan, director of Stomach Cancer UK. Gastroenterologists like Dr. Yanghee Woo in California note that a significant portion of their patients are in their 20s, 30s, and 40s, often with young families and careers.
The reasons behind this resurgence are not fully understood, but potential contributing factors are being investigated. Some research suggests modern diets, particularly those high in ultra-processed foods, may play a role. High salt intake, often associated with processed foods, is known to damage the stomach lining and has been linked to increased cancer risk. Heavy alcohol consumption is also identified as a risk factor.
An unexpected factor being explored is the impact of antibiotics. While widespread antibiotic use helped reduce H. pylori infections, contributing to the disease's previous decline, some experts theorize it may have also disrupted the gut microbiome. This delicate balance of microbes plays a role in regulating inflammation and protecting the stomach lining, and its disruption could potentially alter cancer risk. This theory is supported by observations of increased risk in individuals born after 1950, coinciding with the introduction of antibiotics.
Overlooked Symptoms and Delayed Diagnosis
A significant challenge in combating this trend is the subtlety and ease with which early symptoms can be dismissed. Persistent indigestion, bloating even after small meals, nausea, and general abdominal discomfort are often attributed to stress, diet, or minor digestive issues like acid reflux. Many patients delay seeking medical help, sometimes for months or even years.
"Most of the patients had symptoms for quite some time," said Dr. Woo. "But they either ignored them or assumed it was something benign, like acid reflux." By the time younger patients reach specialists, the disease has frequently progressed. Symptoms can include difficulty swallowing, regular vomiting, significant weight loss, severe fatigue due to anemia, or black stools indicating internal bleeding.
Age itself can be a barrier, as both patients and doctors may assume younger individuals are less likely to have cancer. This can delay necessary diagnostic tests. Chloe Sterling, a 31-year-old nurse, had her stomach cancer initially mistaken for heartburn, and it took 18 months before she was diagnosed. Similarly, Steven Kopacz, a drummer, initially attributed his persistent stomach pain to nerves or an ulcer before being diagnosed with stage 3 gastric cancer at age 33.
Advancements Offer Hope
Despite the concerning trends, there are reasons for cautious optimism. Research indicates that more cases are being diagnosed at earlier stages, which significantly improves treatment outcomes. Between 2004 and 2021, the number of early-stage stomach cancer diagnoses reportedly increased by over 50 percent, while late-stage diagnoses declined.
Advances in detection methods and treatments are beginning to shift the outlook. Greater awareness of cancer in younger populations among both patients and healthcare providers may also contribute to earlier detection. In addition to traditional treatments like surgery, chemotherapy, and radiotherapy, doctors now have access to targeted therapies and immunotherapy drugs that can more effectively combat the disease. Researchers are also exploring combinations of therapies, vaccines, and personalized approaches, raising hopes for continued improvement in survival rates. "A diagnosis does not necessarily mean it is terminal," noted Dr. Woo. "In the past, this was a very difficult cancer to treat. But we now have excellent targeted drugs and other methods that can be used to fight it."