Gastric Cancer nursing care: what to assess and what to do first

The pathophysiology in one pass

Most gastric cancer is adenocarcinoma arising from the stomach's mucosal lining, strongly associated with chronic Helicobacter pylori infection, atrophic gastritis, smoked or salted foods, and, in a minority, hereditary syndromes. Chronic inflammation drives a sequence from gastritis to intestinal metaplasia to dysplasia to invasive cancer over years, which is part of why the disease develops so quietly.

The stomach's capacity for distension means a tumour can grow substantially before it produces a mechanical symptom like obstruction, and early mucosal disease rarely causes pain the way ulcer disease does. Instead, early tumours interfere with normal gastric accommodation and motility in subtle ways, which is exactly why vague early satiety, feeling full after only a few bites, becomes the earliest signal rather than pain or bleeding. By the time alarm features like weight loss, a palpable mass, or overt bleeding appear, the disease has often advanced locally or spread to regional nodes.

Assessment findings that matter

The finding to prioritise is early satiety described as vague and easily dismissed. Patients report feeling full after a small amount of food, bloating after ordinary meals, or mild upper abdominal discomfort that they and often their providers attribute to indigestion, gastritis, or reflux for months before further workup occurs. Ask specifically how long the fullness has been present and whether it has changed the patient's usual portion sizes.

Screen for accompanying red-flag features: unintentional weight loss, dysphagia if the tumour involves the gastroesophageal junction, persistent nausea, or a change in stool colour suggesting occult bleeding. A palpable epigastric mass or a firm, enlarged left supraclavicular node (Virchow's node) indicates locally advanced or metastatic disease and should prompt urgent evaluation.

Check for signs of anemia, fatigue, pallor, and tachycardia, since chronic low-level GI bleeding is common and often the first objective abnormality found on labs when symptoms have been vague. Assess baseline nutritional status, weight trend, and albumin, as these will guide how aggressively nutrition support needs to start.

What the exam asks about this

NCLEX questions on gastric cancer frequently test whether you can distinguish vague early satiety and bloating dismissed as indigestion from a straightforward ulcer presentation, since the exam wants you to recognise that a symptom pattern lasting months without response to typical antacid therapy warrants further investigation rather than reassurance.

Expect items on post-gastrectomy care, particularly recognition and management of dumping syndrome: rapid gastric emptying causing diaphoresis, tachycardia, and abdominal cramping shortly after eating, managed with small frequent meals, lying down after eating, and limiting simple sugars and fluids with meals.

You will also see prioritisation questions comparing a patient with chronic vague GI complaints against one with acute bleeding, where the exam expects you to recognise hematemesis or melena as the higher acuity finding, alongside questions on B12 and iron deficiency risk after gastrectomy due to loss of intrinsic factor and reduced acid for iron absorption.

Nursing interventions in priority order

Nutritional assessment and support take priority given how central early satiety and progressive intake reduction are to this disease. Offer small, frequent, calorie-dense meals, involve dietetics early, and trend weight and albumin to catch decline before it becomes severe.

Monitor for and manage GI bleeding, checking stool for occult blood, tracking hemoglobin trends, and watching for hematemesis or melena, which need immediate reporting rather than routine documentation.

For patients undergoing gastrectomy, prioritise post-operative monitoring for anastomotic leak and dumping syndrome once oral intake resumes. Teach the dumping syndrome eating pattern before discharge: small meals, separating liquids from solids by 30 minutes, limiting concentrated sugars, and lying down for 20 to 30 minutes after eating to slow gastric emptying.

Address the long-term consequence of gastrectomy on vitamin B12 absorption, since removal of the stomach eliminates intrinsic factor production; arrange for lifelong B12 supplementation, typically by injection, and monitor for iron deficiency anemia as well. Support the patient through the psychological adjustment to a diagnosis that was, for many, missed or minimised for months before confirmation.

Medications and monitoring

Chemotherapy regimens commonly combine a fluoropyrimidine, such as 5-fluorouracil or capecitabine, with a platinum agent like oxaliplatin or cisplatin, sometimes with a taxane added. Monitor for peripheral neuropathy with oxaliplatin, renal function and hydration with cisplatin, and hand-foot syndrome with capecitabine.

For HER2-positive tumours, trastuzumab may be added to chemotherapy; monitor cardiac function periodically given the risk of cardiotoxicity. Proton pump inhibitors are often used in patients being treated for H. pylori-related gastritis or post-surgically to reduce acid-related irritation of the remaining stomach or anastomosis.

If H. pylori is confirmed, expect a multidrug eradication regimen combining a PPI with two antibiotics; reinforce full-course adherence, since incomplete treatment allows resistance to develop. Monitor complete blood counts closely during chemotherapy for neutropenia and thrombocytopenia, and manage nausea proactively with antiemetics given that appetite is already compromised by the disease itself.

When to escalate

Escalate immediately for hematemesis, melena, or a sudden drop in hemoglobin, which can indicate active tumour bleeding. Report new or worsening abdominal distension, vomiting, or inability to tolerate oral intake, which can signal gastric outlet obstruction from tumour growth.

After gastrectomy, escalate for fever, tachycardia, or increasing abdominal pain, which may indicate an anastomotic leak, and for signs of severe dumping syndrome such as significant hypotension or syncope after meals. Persistent, worsening early satiety despite treatment should also be reported, as it can indicate disease progression rather than a stable post-treatment symptom.