ideasIdea
Stomach cancer serology screening for high-risk migrant communities in low-incidence countries
People who grew up in East Asia, Eastern Europe or Latin America keep a high stomach cancer risk after migrating. Cheap blood tests could select who needs an endoscopy.
Pepsinogen I/II ratio plus H. pylori serology (the ABC method) stratifies gastric cancer risk in Japan. Western countries do not screen because average incidence is low, but first-generation migrants from high-incidence regions carry two- to five-fold risk. Propose targeted serological screening with endoscopy for high-risk groups.
Hypothesis
Serology-directed endoscopy in first-generation migrants from high-incidence regions aged 50 and over yields early gastric cancer or high-grade dysplasia in at least 1% of endoscopies, comparable to Japanese and Korean programmes.
Rationale
Risk follows birthplace and childhood H. pylori acquisition; the serology is cheap and validated.
What would test it
Pilot in 5,000 participants in a large migrant community (e.g. California, London); yield and cost per early cancer.
Maturity
speculative
Who has to act
clinic
Cost to try
Small (under $1M)
Years to first evidence
4
Bottlenecks it attacks
- Most lethal cancers are found late · Screening exists for only a few cancers. Pancreatic, ovarian, liver, oesophageal and most lung cancers are found when cure is unlikely.
- Trials do not represent the people who get cancer · Older, Black, Hispanic, Asian, rural, poor and multimorbid patients are under-represented, so results may not apply to them.