What to expect from immunotherapy for stomach cancer

Immunotherapy helps the immune system identify and attack cancer cells. For stomach cancer, it may be used with other medicines or in a later treatment setting when test results and the wider clinical picture support it. Your oncology team will consider the cancer’s extent, previous treatment, nutrition, other illnesses, and how well you are coping physically.

Treatment is often delivered through a vein. Each visit may include a symptom review, examination, blood tests, and sometimes a scan at a later appointment. Tiredness, appetite change, nausea, diarrhoea, rash, cough, or joint aches can occur. Inflammation caused by immune activity may affect the bowel, liver, lungs, hormone glands, kidneys, or skin.

Tell your team about vomiting, loose stools, abdominal pain, poor appetite, trouble swallowing, weight change, fever, or reduced urine. These symptoms can affect hydration and nutrition, which are especially relevant when stomach cancer or previous treatment has changed eating patterns.

Bring your medicine list and mention supplements before starting anything new. Keep blood-test and scan appointments, note when symptoms begin, and ask for dietitian support if meals are becoming difficult. Small, frequent meals or prescribed nutrition support may be useful for some people, but follow advice tailored to you.

Contact your cancer team promptly for persistent vomiting or diarrhoea, severe abdominal pain, black or bloody stools, yellow skin or eyes, dark urine, a new widespread rash, cough, breathlessness, severe headache, confusion, or a major change in thirst or urination.

Get urgent help for collapse, severe breathing difficulty, vomiting that prevents fluids, sudden confusion, or heavy bleeding. Do not wait for a routine appointment when symptoms are escalating.

Ask what test results support immunotherapy, whether it will be combined with chemotherapy or another medicine, how scans will be interpreted, and how nutrition and symptom control will be supported. Clarify the number to call when the clinic is closed.