The short answer
Dave Coulier announced Stage 3 non-Hodgkin lymphoma on TODAY in November 2024, after a golf-ball-sized lymph node appeared in his groin. Chemotherapy cleared it by March 2025. Surveillance PET scans then picked up a second, unrelated cancer at the base of his tongue, and in February 2026 he said he was in remission from both.
Coulier announced Stage 3 non-Hodgkin lymphoma, a B-cell type, on TODAY in November 2024.
His first sign was a golf-ball-sized lymph node in his groin that swelled within a week of a cold.
Doctors sampled his bone marrow to work out the stage before treatment started.
By March 2025 he said there was no sign of the lymphoma, and he continued having PET scans every few months.
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The full explanation.
A lump that arrived in a week
Dave Coulier played Uncle Joey on Full House. In November 2024 he used the TODAY show to say something else: he had Stage 3 non-Hodgkin lymphoma.
The sign that started it was ordinary at first. He caught a cold. His lymph nodes had swollen with illness before, so that alone meant little. What was different was the speed and the size. Within a week he found a golf-ball-sized lump in his groin.
"It swelled up immediately," he said. "I thought, 'Wow, I'm either really sick, or my body's really reacting to something.'"
His doctors ran bloods, an EKG and scans. All came back fine. They were still uneasy about how fast the lump had grown, so they took it out and tested it. Three days later he had a diagnosis of B-cell lymphoma.
That sequence is worth holding on to. Normal blood tests did not settle the question. The lump did.
Why they went looking in his bone marrow
Before treatment could be planned, Coulier's team took a sample of his bone marrow.
Lymphoma is staged differently from a solid tumour. The question is not how big a lump is, but how widely the disease has spread through the lymphatic system, and whether it has reached the marrow or other organs. That is why the answer needed a needle rather than a scan alone.
He described the wait honestly. "That was pins and needles for a few days because I didn't know what stage it was or if it had progressed."
The result was Stage 3, with the marrow clear. He said his doctors told him that combination made his outlook much better than the number alone suggested. Stage 3 sounds frightening. In lymphoma, treatment is still aimed at cure at that stage, which is not true of most solid cancers.
Chemotherapy followed, through a port placed under the skin. He called it grueling. By March 2025 he said there was no sign of the lymphoma left.
The scan that found the next one
Being clear did not mean being finished. He kept having PET scans every few months.
"A couple of months ago, I had a PET scan, and something flared on the scan," he said. "The doctor said, 'We don't know what it is, but there's something at the base of your tongue.'"
He had no symptoms. None at all.
The next part shows how untidy real follow-up can be. The first biopsy found no cancer cells. That was reassuring, and it was wrong. At his next scheduled scan the area had flared again and grown. A CT scan, an MRI and a second, larger biopsy came back positive.
In October 2025 he was diagnosed with an early-stage cancer at the base of his tongue. He announced it on TODAY on December 2. His doctors told him it was a new disease, not a return of the lymphoma. "They said it's totally unrelated to my non-Hodgkin's lymphoma," he said. "This is a new cancer."
What "p16-positive" tells the doctors
The pathology report described the tongue cancer as p16-positive.
P16 is a protein. Pathologists stain for it because it works as a stand-in marker for human papillomavirus. A p16-positive throat cancer usually means HPV was involved in causing it, often from an infection picked up decades earlier and long forgotten.
That single word changes how the cancer is understood. HPV-related throat cancers behave differently from those caused mainly by tobacco and alcohol. They tend to appear in younger people, and they generally respond better to treatment. Coulier put his own version of it plainly: "They said it could stem from having an HPV virus up to 30 years ago."
HPV vaccination is the prevention side of this, given long before any of it. Our page on HPV and cancer covers what the virus does and who the vaccine is for, and our guide to head and neck cancer covers the group of cancers this one belongs to.
Thirty-five appointments
Radiation for a cancer at the base of the tongue is not one procedure. It is a schedule.
Coulier had 35 treatments, Monday to Friday, finishing on December 31, 2025. He described it as "a whole different animal than chemo", less brutal in the moment but with its own load: nausea, what he called radiation brain, and pain in his face and tongue where tissue had been taken.
That pattern is typical. Radiation to the head and neck accumulates. Sore mouth, taste changes, dry mouth and difficulty swallowing usually build over the weeks and take time to settle afterwards. On February 4, 2026 he said he was in remission from both cancers, and he was frank about the cost: radiation, he said, "can steal parts of your life away from you — psychologically, emotionally and certainly physically."
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Two cancers, one lesson
Dave Coulier's first cancer announced itself with a lump he could feel in a week. His second announced itself with nothing at all — it was found because he kept turning up for scans he no longer felt he needed. He put the strange logic of that in his own words: the first cancer is what led anyone to look for the second. Follow-up after treatment is not paperwork, and a biopsy that comes back clear is not always the end of the question.
See an error, old source, or unclear wording? Report it here — we log and act on material corrections.
Sources
https://www.today.com/health/news/dave-coulier-non-hodgkin-lymphoma-cancer-rcna179584
https://www.today.com/health/news/dave-coulier-tongue-cancer-rcna245598
https://abcnews.go.com/GMA/Culture/dave-coulier-reveals-tongue-cancer-remission/story?id=129822268
https://www.cancer.gov/types/lymphoma/patient/adult-nhl-treatment-pdq
https://www.cancer.gov/types/head-and-neck/head-neck-fact-sheet
https://www.cancer.gov/about-cancer/causes-prevention/risk/infectious-agents/hpv-and-cancer
Put the story in context
Prevention, possible warning signs, screening, and diagnosis
This story relates to cancer. The information below is general: it does not reveal anything else about a public person’s health, and not every point applies to every cancer. Personal advice depends on age, symptoms, family history, exposures, and medical history.
Prevention and risk reduction
Not every cancer can be prevented. Avoiding tobacco, protecting skin from ultraviolet radiation, limiting alcohol, staying active, and receiving recommended HPV or hepatitis B vaccination can lower the risk of certain cancers. A risk factor is not a prediction or a cause in one individual.
Symptoms and possible early signs
Possible signs vary and are often caused by conditions other than cancer. Changes worth discussing include a new lump, unexplained bleeding or weight loss, a persistent cough, lasting bowel or bladder changes, a changing skin spot, or symptoms that persist or worsen. Some early cancers cause no symptoms.
Screening and early detection
Screening looks for certain cancers before symptoms begin. Recommended tests exist only for some cancers and depend on age and risk. Screening can have benefits and harms; it is not the same as evaluating a new symptom, and there is no single routine scan or blood test that reliably screens for every cancer.
How cancer is diagnosed
Diagnosis may involve a history and exam, imaging, laboratory tests, and often a biopsy. Pathology can identify the cancer type and may test biomarkers that guide treatment. Symptoms, screening results, tumor markers, or online stories alone cannot confirm cancer.
Learn about this story’s cancer topic
A public story may encourage questions, but it should not be used to estimate your risk or choose testing. Contact a healthcare professional about a persistent or concerning change. Seek urgent care for severe or rapidly worsening symptoms.
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Common questions
How was Dave Coulier's lymphoma found?
He came down with a cold and, within a week, found a golf-ball-sized lump in his groin. His blood tests and heart tests were normal, but the speed of the swelling worried his doctors. They removed and biopsied the lymph node, and it showed B-cell non-Hodgkin lymphoma.
Why did they take a bone marrow sample?
To work out the stage. Lymphoma staging asks how far the disease has travelled through the lymphatic system and whether it has reached places like the bone marrow. Coulier described that wait as pins and needles, because the answer would shape everything that followed. His marrow was clear, and he said his doctors told him that made his outlook considerably better.
How was the second cancer found?
By a routine follow-up scan, not by a symptom. He had no signs at all. After his lymphoma cleared, he kept having PET scans every few months. One flagged something at the base of his tongue. A first biopsy found no cancer cells, but the next scan showed the area had grown, and a larger biopsy came back positive.
What is a p16-positive cancer?
P16 is a protein that pathologists use as a marker for human papillomavirus. When a throat cancer tests p16-positive, it usually means HPV played a part in causing it, often from an infection acquired many years earlier. Coulier said his doctors described his as unrelated to the lymphoma.
Is Dave Coulier in remission now?
On February 4, 2026, he said: 'I'm in remission with both cancers. And what a journey this has been.' That is the most recent statement we can point to. Remission means there is no sign of the disease, which is why follow-up scans continue.
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Last updated: 2026-08-09Next planned review: 2027-08-09
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How this page was created
Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes. We do not employ clinicians and do not intend to — our work is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status: Source checked — This page was written with AI assistance and checked line by line against the sources listed on it. That confirms the sources support what the page says. It is not a medical review, and it does not confirm the page is complete or right for your situation.
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