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Gastric cancer

Essential points for quick revision.

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Escalate

Haematemesis with shock, gastric perforation, complete outlet obstruction, aspiration, severe metabolic depletion or sepsis requires immediate resuscitation and urgent gastroenterology, upper-GI surgical and anaesthetic input. Treat the presenting bleeding, perforation or obstruction while preserving an oncological tissue and staging plan when feasible. Do not delay emergency source control for routine cancer investigations, but ensure that specimens and follow-up ownership are not lost after the acute episode.

Synopsis

Recognise gastric cancer and its emergency complications, use the current suspected-cancer route, obtain adequate histology and staging, and integrate endoscopic, surgical, systemic, palliative and nutritional care through an oesophago-gastric multidisciplinary team.

  • Gastric adenocarcinoma often causes non-specific early symptoms, so progressive weight loss, early satiety, anaemia, persistent vomiting and age-based NICE combinations must trigger timely endoscopy.
  • NICE includes people aged 55 or over with weight loss plus upper abdominal pain, reflux or dyspepsia in the suspected oesophageal or stomach cancer pathway.
  • High-quality gastroscopy should define tumour site, size, morphology and junctional relationship and obtain multiple adequate biopsies while inspecting the whole stomach for synchronous disease.

Key red flags

Outlet obstruction

Recurrent non-bilious food vomiting, dehydration and a succussion splash suggest antral or pyloric tumour and require admission when liquids, renal function or electrolytes are compromised.

Investigation priorities

01
High-quality gastroscopy and biopsyFirst step

Locate the lesion, establish histology and assess synchronous gastric disease.

Management branches

DetectRoute symptoms to endoscopy

Weight loss, early satiety, persistent vomiting, iron deficiency or a current NG12 age-and-symptom combination raises gastric cancer concern.

  1. Check dysphagia, bleeding, vomiting, measured weight, anaemia, abdominal findings and family history, then use the suspected-cancer or direct-access endoscopy route specified by current NICE and local services.
  2. Send relevant FBC, renal and liver profiles without allowing normal results to delay endoscopy when the symptom combination already qualifies.
TreatIntegrate tumour and whole-person care

The MDT has established stage, resectability, physiological fitness and preferred treatment goals.

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Sources and review status5 sources · checked 27 Aug 2026 · clinical review pending
Sources

Sources and review status

National guidance is shown before implementation-dependent detail. Typical adult dose examples remain subject to patient factors, contraindications and the live BNF or specialist protocol. Source check completed 27 Aug 2026; clinical approval remains outstanding.

Authoring stateRapid draftClinical stateAwaiting reviewJurisdictionUnited Kingdom