What Cancer Does Pope Leo Have? Lung Adenocarcinoma Explained

TL;DR

• The diagnosis is lung adenocarcinoma, confirmed by examination of tissue during surgery on 13 October. It is the most common subtype of non-small cell lung cancer.
• Surgeons removed the lower lobe of the right lung using a video-assisted technique. The Vatican reported the operation as successful with no complications.
• The stage has not been disclosed. The Vatican has released no information about tumour size, lymph nodes or spread, and examination of the removed tissue is still to come.
• Lung adenocarcinoma is not confined to smokers. Smoking remains the largest preventable risk factor, but several of the risk factors the NHS lists have nothing to do with cigarettes.
• Early lung cancer often causes no symptoms at all. A cough lasting more than three weeks, breathlessness, coughing up blood or unexplained weight loss are all reasons to see a GP.

What the Vatican Has Confirmed

The Holy See Press Office published a statement from Dr Luigi Carbone and Professor Stefano Margaritora on the afternoon of 13 October. It says that to ensure a radical procedure, the lower lobe of the right lung was removed using a video-assisted technique, and that intraoperative histological examination confirmed the diagnosis of lung adenocarcinoma, as pre-operative tests had suspected. The Pope, who is 71, was in the operating theatre for around three hours, with the operation itself lasting about ninety minutes.

A radical procedure describes what the surgeons set out to achieve, not a finding that every cancer cell has gone. That question is answered by the laboratory, not the operating theatre. Examination of the removed tissue is due in the days after surgery, and until those results exist there is no basis for describing the cancer's stage or what happens next.

It is worth being clear about what has not been said. The Vatican has given no tumour size, no information about whether lymph nodes were involved, no stage and no treatment plan beyond the operation itself. Anything presented as a prognosis at this point is guesswork.

What Lung Adenocarcinoma Is

Lung cancer divides into two broad families: non-small cell and small cell. Non-small cell accounts for most cases and includes adenocarcinoma, squamous cell carcinoma and several less common types. Adenocarcinoma arises from glandular cells and tends to develop in the outer parts of the lung, though it can appear elsewhere. Knowing the subtype matters, because these cancers differ in how they behave and in which treatments work against them.

That distinction is also why a tissue diagnosis is more informative than an image. A scan can show that something is there and roughly where it sits. Only examining the cells establishes what it is. In this case the pre-operative tests had already pointed towards adenocarcinoma, and examination during the operation confirmed it.

What the subtype does not tell you is how far the disease has progressed. Type and stage answer different questions — one describes what the cancer is made of, the other how much of it there is and where it has reached. Both are needed before anyone can say anything useful about treatment or outlook.

Can You Get It Without Smoking?

Yes. Lung cancer occurs in people who have never smoked, and adenocarcinoma is the subtype most associated with that group. Smoking is still by far the largest preventable cause, and nothing here should be read as softening that. But the assumption that a lung cancer diagnosis implies a smoking history is wrong, and it does real harm when it delays people seeking help.

The NHS lists the risk factors for lung cancer as smoking, long-term exposure to other people's smoke, chronic obstructive pulmonary disease, having a close relative who has had lung cancer, long-term exposure to asbestos fibres through work in the building industry, long-term exposure to air pollution, and long-term exposure to radon — a naturally occurring radioactive gas that reaches high levels in buildings in some parts of the UK. Five of those seven have nothing to do with whether you have ever smoked.

Some lung adenocarcinomas also carry acquired genetic changes that drive the cancer's growth, and a few of those changes can be targeted with specific drugs. These are alterations within the tumour cells themselves. They are not inherited, and finding one does not mean a family carries a cancer gene.

None of this explains why any individual develops the disease. Risk factors describe patterns across large populations; they do not account for a particular person's tumour. The Vatican has not suggested a cause, and no one outside the Pope's medical team is in a position to.

Why It Often Causes No Symptoms

The hardest feature of lung cancer is that early disease is frequently silent. A small tumour in the outer part of a lung may not obstruct an airway or interfere with breathing, so there is nothing for the person to notice. Tumours found at this stage are often picked up incidentally, during imaging done for some other reason.

When symptoms do appear, the NHS names a cough that is not going away, shortness of breath, coughing up blood, chest or shoulder pain, frequent chest infections or one that will not clear, losing weight without trying, loss of appetite and feeling tired all the time. Less commonly there can be swelling of the face or neck, difficulty swallowing, a hoarse voice that persists, or fingertips that widen or curve downwards.

All of these symptoms have causes far more common than cancer, and most people who have them do not have it. The point is not to worry — it is that they are worth getting looked at rather than explained away, particularly by people who assume their lungs are not at risk.

What Removing a Lung Lobe Means

The operation is called a lobectomy. The right lung has three lobes and the left has two, so a right lower lobectomy takes the bottom section of the right lung and leaves the other two. It is a long-established operation for selected non-small cell lung cancers, and NICE guidance supports it as a treatment offering the prospect of cure in patients well enough to undergo it.

A video-assisted technique means the surgery is performed through several small incisions using a camera and instruments, rather than opening the chest. It reduces some of the physical insult of the operation, but it remains major surgery with a real recovery period, and the approach does not change what was removed.

Losing a lobe reduces the total amount of lung tissue available, and most people adapt to that reasonably well if the remaining lung is healthy. Recovery varies with age, fitness, the condition of the rest of the lungs and whether any complications arise.

What Determines the Prognosis

Stage is usually the single most important factor. Doctors assess the size and extent of the main tumour, whether nearby lymph nodes contain cancer cells, and whether there is any evidence of spread further afield. Those three elements combine into the TNM staging system, which is what guides treatment decisions and what survival statistics are built on.

For general context, Cancer Research UK reports five-year net survival for lung cancer in England at almost 65% for stage 1, around 40% for stage 2, around 15% for stage 3 and around 5% for stage 4. Those figures cover people diagnosed between 2016 and 2020, are not age-standardised, and describe lung cancer as a whole rather than any particular subtype.

They cannot be applied to the Pope, and not only because his stage is unknown. Population statistics describe averages across tens of thousands of people with different tumours, ages, fitness levels and treatments, drawn from a period before some current therapies were in routine use. They are a guide to how a disease behaves in general, not a prediction about an individual.

How Lung Adenocarcinoma Is Treated

Treatment depends on stage, on the tumour's genetic characteristics, on the person's general health, and on whether the cancer can be removed completely. For early-stage disease, surgery may be the main treatment, and NICE supports lobectomy as a curative option for suitable patients.

Beyond surgery, the options are radiotherapy, chemotherapy, immunotherapy and targeted medicines, used alone or in combination. Some are given before or after an operation to reduce the chance of the cancer returning; others are used to control disease that has spread. Testing the tumour for specific genetic alterations is what identifies whether a targeted drug is an option.

None of that describes a plan for the Pope. The Vatican has confirmed an operation and nothing else. Whether any further treatment is recommended depends on findings that have not been released.

The Question About November

Pope Leo XIV is scheduled to begin a twelve-day visit to South America on 6 November, starting in Montevideo and travelling through Uruguay, Argentina and Peru before departing from Callao on 17 November. The Holy See published that itinerary on 21 September, three weeks before the surgery.

Whether the trip goes ahead is a clinical judgement for his doctors, not something that can be worked out from general guidance. Fitness to fly after a lobectomy depends on how recovery progresses, whether complications occur, and an individual assessment — which is why no one outside his medical team can sensibly predict it. The Vatican has said his hospital stay is expected to last about a week, and has not commented on the trip.

What This Actually Means

The diagnosis has drawn attention to a cancer that is common and widely misunderstood. Lung adenocarcinoma can develop in people who have never smoked, frequently produces no symptoms until it is well established, and cannot be judged from how well or unwell someone appears.

What has happened is specific and limited: a nodule was investigated, pre-operative tests suggested adenocarcinoma, surgery removed the affected lobe, and examination of the tissue confirmed the diagnosis. That is a materially different situation from a cancer found after it has spread. It is not the same as knowing the stage, and it is not a result.

For readers, the useful part is smaller and more practical than the news. Persistent respiratory symptoms deserve assessment rather than assumption, and the belief that lung cancer only happens to smokers is one of the reasons people wait. Equally, a lung nodule is not a diagnosis — most turn out to be something else entirely.

FAQ

What cancer has Pope Leo XIV been diagnosed with?

Lung adenocarcinoma, a subtype of non-small cell lung cancer. The Vatican confirmed it after tissue was examined during surgery on 13 October 2026.

Has it spread?

The Vatican has not said. No stage has been released, and no information has been given about lymph nodes or spread. Examination of the removed tissue was still to come at the time of the announcement.

Is lung adenocarcinoma serious?

It can be, but the outlook varies enormously depending on stage. A small tumour removed before it has spread carries a very different outlook from advanced disease with the same name.

Can someone who has never smoked develop lung cancer?

Yes. Adenocarcinoma in particular occurs in people who have never smoked. Several of the risk factors the NHS lists — radon, asbestos, air pollution, COPD, family history — are unrelated to smoking.

What part of the lung was removed?

The lower lobe of the right lung, in an operation called a right lower lobectomy, performed using a video-assisted technique.

Does lung cancer always cause a cough?

No. Early lung cancer often causes nothing at all. A persistent cough is one possible sign among several, including breathlessness, coughing up blood, chest pain and unexplained weight loss.

The Bottom Line

Pope Leo XIV has lung adenocarcinoma and has had the lower lobe of his right lung removed. The Vatican describes the operation as successful and uncomplicated, and has released nothing about the cancer's stage.

The surgeons' stated aim was a radical procedure. Whether that was achieved is a question for the pathology, not the operating theatre, and those results have not been made public. Until they are, the honest position is that the type of cancer is known and its extent is not.

This article is general information and not a substitute for medical advice. If you have a cough lasting more than three weeks or any other persistent respiratory symptom, see your GP; if you cough up blood, seek urgent advice.

Sources

• Holy See Press Office. Press release on the Holy Father's thoracic surgery. 13 October 2026. press.vatican.va
• Vatican News. Pope Leo XIV undergoes successful lung surgery. 13 October 2026. vaticannews.va
• NHS. Lung cancer: causes. nhs.uk
• NHS. Lung cancer: symptoms. nhs.uk
• NHS. Lung cancer: treatment. nhs.uk
• National Institute for Health and Care Excellence. Lung cancer: diagnosis and management. NICE guideline NG122. nice.org.uk/guidance/ng122
• Cancer Research UK. Survival for lung cancer. cancerresearchuk.org
• Holy See. Itinerary of the apostolic journey to Uruguay, Argentina and Peru, 6–17 November 2026. Published 21 September 2026.