Bleeding and Airway Risks With Head and Neck Tumours on Immunotherapy — When It Is an Emergency

Any bleeding that is more than a streak is an emergency. Go to the nearest emergency department now. Do not wait for the next clinic visit and do not travel across the city to a preferred hospital. Even a small bleed that stopped on its own needs to be seen the same day.

Every one of these is reported the same day, not at the next appointment. Immunotherapy is given as day care at CION centres, so the days between cycles are days when nobody is watching the patient except the family — which is exactly why the family needs to know these signs.

Most patients with head and neck cancer in India are not candidates for immunotherapy. It is considered mainly when the cancer has returned and cannot be removed or re-irradiated, or when it has spread. Disease that can still be treated with surgery, radiation or chemoradiation is treated that way instead.

Eligibility is confirmed on tissue and on examination, never from a scan report alone. If you were told “you can take immunotherapy” without a biopsy-confirmed type and a PD-L1 result, ask what that advice was based on. Any cost discussion happens after that, in writing, and all figures are indicative, as of August 2026.

Yes, it can, although serious bleeding is uncommon. When a tumour responds, it breaks down from the inside. If it has grown against or into a blood vessel, that vessel can be left exposed as the tumour tissue dies. Head and neck tumours sit close to large vessels, which is why this matters here.

Tumours that shrink do not simply get smaller and neater. They cavitate — the centre dies and hollows out — and the dead tissue has to go somewhere. On the surface of the mouth or throat that shows up as blood-streaked saliva or spat-out clots. Deeper in, where a tumour has been holding itself against the wall of a vessel, the vessel loses the tissue that was covering it.

Three things raise the risk far more than the immunotherapy itself does. A neck that has already been irradiated has vessel walls and skin that heal poorly. A neck that has been operated on may have a vessel lying under a thin flap. And a tumour that was already touching or encircling the carotid artery on the staging scan was a bleeding risk on the day it was diagnosed, before any treatment was given. Bleeding also happens in head and neck tumours that are on no treatment at all.

This is the part of the conversation that usually gets skipped, and skipping it helps nobody. A family told only that “the tumour is responding” is not equipped for a mouthful of blood at 2am. A family told what to watch for, and which hospital to go to, is.

These are typical patterns described in NCCN and ESMO head and neck guidance and in published head and neck oncology literature, current as of August 2026. They are patterns, not predictions, and none of them can be read off a page to tell you what will happen to you.

The single most important sign is a small bleed that stops by itself. It is called a herald bleed and it can come hours to days before a much larger one. Blood-streaked saliva, a new salty or metallic taste, and a neck swelling that is suddenly bigger also count.

• A small bleed that stopped on its own. This is the one that gets ignored, because it stopped. Treat it as a warning that a vessel is being eroded. It needs an emergency assessment the same day, not a mention at the next cycle.
• Blood-streaked saliva, phlegm or sputum. Often the earliest sign. Photograph it if you can bear to, note the time, and call the helpline that day.
• A new salty or metallic taste in the mouth. This is frequently blood the patient cannot see, tracking from further back in the throat.
• Oozing from a neck wound or around a tracheostomy tube. Any fresh blood around a tracheostomy is treated as an emergency, because the airway and a large vessel are both close by.
• A neck swelling that is suddenly larger, pulsating or newly painful. Take the most recent scan report with you and go the same day.
• Voice change, noisy breathing, or not being able to lie flat. These are airway signs rather than bleeding signs, but they are equally urgent and often appear in the same patients.

For the person caring at home: you are not being asked to diagnose anything. You are being asked to notice and to phone. Nobody at CION will think you overreacted for calling about blood-streaked saliva. The call that is regretted is the one that waited until morning.

It is assessed before the first cycle, not after a problem. The team looks at where the tumour sits in relation to the carotid artery and the airway on your scans, at what radiation and surgery you have already had, at your clotting and haemoglobin, and at whether the airway needs securing first.

1. 1

   Map the tumour against the carotid artery and the airway

   Your diagnostic scans are reviewed specifically for this: does the tumour touch, encircle or invade a major vessel, and how much room is left in the airway. This is a separate question from staging, and it is asked out loud at the tumour board rather than assumed.

2. 2

   Review the radiation and surgery history of that neck

   A previously irradiated or operated neck behaves differently. Tissue heals slowly, vessel walls are more fragile, and a flap may be all that covers a large vessel. This history changes the level of monitoring, and sometimes changes the recommendation itself.

3. 3

   Check haemoglobin, platelets, clotting and any blood thinners

   Anticoagulants and antiplatelet drugs taken for the heart or for a previous clot are reviewed with the prescribing physician, not stopped on our own. Low platelets and abnormal clotting are corrected before treatment where possible.

4. 4

   Decide whether the airway is secured before treatment

   Where the airway is already narrow, a tracheostomy may be discussed before immunotherapy rather than after an emergency. It is a hard conversation and it is had in advance, with the family in the room, because an airway secured electively is a very different event from an airway secured at 3am.

5. 5

   Write the emergency plan down, then start day-care treatment

   You leave with a written plan: which signs mean call, which mean ambulance, which hospital to go to, and what to tell the emergency team. Immunotherapy is then given as day care at CION centres. Response-assessment PET-CT is coordinated at partner imaging centres rather than performed at CION. CION does not provide CAR-T or other cell therapies; where such treatment is being considered, we say so and refer. Costs are set out in writing and are indicative, as of August 2026.

Call an ambulance first. Sit the person upright and leaning forward so blood drains out of the mouth, not into the lungs. Press a clean cloth on a bleeding neck wound and keep pressing. Do not lay them flat and do not give anything by mouth.

• Call for help before anything else. One person calls the ambulance and names the nearest emergency department. Another stays with the patient. Do not spend those minutes comparing hospitals.
• Sit them up and lean them forward. This lets blood come out of the mouth instead of down into the lungs. Lying flat is the one position to avoid.
• Press on the bleeding point only. If blood is coming from a wound on the skin of the neck, press a clean folded cloth firmly on that point and keep pressing until help arrives. Never press around the whole neck, and never on both sides.
• Nothing by mouth. No water, no food, no tablets. The airway may need to be secured in hospital and a full stomach makes that more dangerous.
• Take the paperwork. Current medicine list, last discharge summary, most recent scan report, and the date of the last immunotherapy cycle. Keep them in one bag that never gets unpacked.
• Say the sentence at the door. “This patient is on immunotherapy for head and neck cancer, the neck has been irradiated, and this is a tumour bleed.” It gets the right team called immediately.

Keep a dark-coloured towel with the emergency bag. It is a small thing, and families who have been through a large bleed say it made the moment survivable for everyone in the room. Immunotherapy is given at CION as a day-care infusion, so most of the time the family is the first responder — which is precisely why this plan is written down before it is needed.

Immunotherapy is used far more often in bladder and kidney cancer than in the head and neck. The pages below cover the parts of the treatment that are the same wherever it is given — how a response is judged on scans, what maintenance and adjuvant treatment actually mean, and when treatment is stopped.

• Immunotherapy for Advanced Bladder Cancer — a clear worked example of how eligibility, response assessment and stopping rules are decided in a cancer where immunotherapy is used routinely.
• Maintenance Immunotherapy After Chemotherapy in Bladder Cancer — read this if you have been told treatment will continue after chemotherapy finishes, and you want to know what “maintenance” means in practice.
• Adjuvant Immunotherapy After Kidney Cancer Surgery — what it means to be given immunotherapy after an operation rather than for visible disease, and how that decision is reached.
• Immunotherapy at CION Cancer Clinics — how immunotherapy is planned, delivered and monitored across our centres, who decides, and what the day-care visit involves.

Know the Plan Before the Emergency

Where the tumour sits, what to watch for, and which hospital to go to at 2am — these are worked out in advance, not on the night. Bring your reports and we will go through them with you.