When Katie Thurston stood before a room of breast cancer researchers, advocates and supporters in New York City on October 16, she had news that once seemed like a distant possibility.
The former Bachelorette star, who was diagnosed with breast cancer in February 2025 and later learned it had spread to her liver, announced that she currently has no evidence of disease.
For Thurston, 35, the milestone came after more than 600 days of medical appointments, treatment decisions, difficult side effects and uncertainty about what the future might hold.
She shared the news during the Breast Cancer Research Foundation’s 2026 Symposium & Awards Luncheon, where she appeared alongside her husband, comedian Jeff Arcuri.
The announcement was emotional, and understandably so.
But there is an important medical distinction behind those four words.
No evidence of disease does not necessarily mean that someone with stage IV breast cancer has been cured.
Instead, it means that available tests cannot currently detect signs of active cancer. For someone living with metastatic breast cancer, that can represent an extraordinary treatment response while still requiring ongoing medical care and monitoring.
Thurston’s story is bringing attention to a reality that many families don’t fully understand: cancer treatment can produce remarkable results even when doctors cannot promise that the disease will never return.
A Diagnosis That Interrupted Wedding Plans
Thurston first publicly revealed her breast cancer diagnosis in February 2025.
She was 34 years old and preparing for a major new chapter of life with Arcuri.
The couple had become engaged in 2024 and were planning their future together when Thurston discovered that a persistent breast lump needed medical attention.
According to her previous accounts, she initially wondered whether the discomfort was related to her menstrual cycle or exercise.
But the lump didn’t disappear.
She eventually underwent medical evaluation, including imaging and a biopsy, which confirmed breast cancer.
The diagnosis immediately changed her plans.
Instead of focusing entirely on wedding arrangements, Thurston had to consider where she would receive treatment, what medical procedures might be necessary and how cancer could affect her future.
She later learned that the disease had spread to her liver.
That finding changed her diagnosis to stage IV, also called metastatic breast cancer.
The distinction was significant because cancer that has spread to a distant organ requires a different approach from cancer confined to the breast or nearby lymph nodes.
Thurston and Arcuri married in March 2025, during the early stages of her cancer journey.
Their marriage began alongside a treatment process that would become a major part of their lives.
What Stage IV Breast Cancer Actually Means
Breast cancer is classified as stage IV when cancer cells have spread beyond the breast and nearby lymph nodes to distant parts of the body.
Common locations include the bones, liver, lungs and brain.
This spread is called metastasis.
If breast cancer cells travel to the liver, for example, the disease is still considered breast cancer.
It is not classified as a new primary liver cancer.
That distinction matters because treatment is generally selected according to the biology of the original breast cancer, including characteristics of the cancer cells and the treatments available for that subtype.
Metastatic breast cancer is generally considered treatable but not curable with currently available therapies.
However, the disease does not follow the same course for every patient.
Some people experience rapid progression.
Others respond well to treatment and live for years while receiving ongoing care.
Advances in targeted medications, hormone therapy and other treatments have expanded the options available to many patients.
Thurston’s recent announcement illustrates what a strong response can look like.
It does not establish that her cancer has been permanently eliminated.
Her Treatment Plan Changed After Additional Testing
One of the most complicated parts of Thurston’s journey involved determining the biological characteristics of her cancer.
Early testing produced information that initially suggested one treatment approach.
But subsequent pathology results indicated that her cancer was HER2-negative and hormone-receptor-positive.
Those findings changed her treatment plan.
Rather than beginning the chemotherapy regimen she had initially expected, Thurston started a combination of medications designed to interfere with the hormonal signals and cellular processes that help certain breast cancers grow.
Her treatment has included ovarian suppression, an aromatase inhibitor and a CDK4/6 inhibitor.
These medications work in different ways.
Ovarian suppression reduces the production of estrogen by the ovaries.
Aromatase inhibitors lower estrogen production elsewhere in the body.
CDK4/6 inhibitors target proteins involved in cell division, helping slow the growth of certain hormone-receptor-positive breast cancers.
For eligible patients, these therapies can be an important part of treating metastatic disease.
But the medications can also produce side effects, require monitoring and sometimes need adjustments.
Thurston has spoken openly about those challenges.
The Cancer Responded, but Treatment Wasn’t Simple
Over the months following her diagnosis, Thurston reported that her tumors were shrinking.
By February 2026, she said her breast tumor had decreased in size by approximately 50%.
Her scans also showed no new spread.
Those were encouraging findings, but she continued facing difficult treatment decisions.
At various points, elevated liver enzymes complicated her medication schedule.
Her doctors monitored the results and adjusted or temporarily paused certain treatments.
Thurston described the emotional toll of repeated appointments, blood tests, imaging and medical uncertainty.
She also spoke about needing time away from constant procedures to protect her mental wellbeing.
Her experience reflects an aspect of metastatic cancer care that can be difficult to see from the outside.
Even when treatment is working, the process may involve substantial physical and emotional demands.
A favorable scan doesn’t necessarily mean a patient feels well every day.
And treatment decisions often involve balancing effectiveness with side effects, quality of life and other medical considerations.
A Double Mastectomy Became Another Major Step
In April 2026, Thurston underwent a double mastectomy.
The surgery followed months of systemic treatment and discussions with her medical team.
A double mastectomy involves removing both breasts.
For patients with metastatic breast cancer, surgery is not automatically recommended in every case because the disease has already spread beyond the breast.
Treatment generally focuses on controlling cancer throughout the body.
However, surgery may be considered in selected circumstances based on an individual’s disease, response to treatment and medical goals.
Thurston’s medical team approved the procedure as part of her individualized care.
Her husband shared an encouraging update afterward, reporting that the surgery had gone well.
The operation was another significant event in a journey that had already required major changes to Thurston’s personal and professional life.
But surgery did not eliminate the need to monitor the metastatic disease.
That remained an essential part of her care.
Earlier Scans Had Already Shown Encouraging Results in Her Liver
Before her October announcement, Thurston had shared positive news about the cancer that had spread to her liver.
In January 2026, she reported that a liver MRI continued to show no evidence of disease in that organ.
She shared another encouraging liver update in June.
However, those earlier findings did not mean that all cancer had disappeared from every part of her body.
At the time, Thurston was still undergoing additional monitoring and treatment.
The distinction is important because an imaging result can refer to one organ or one area rather than the entire body.
A scan showing no detectable cancer in the liver does not automatically establish that no active disease exists elsewhere.
By October, Thurston was preparing for another PET scan to assess her condition more broadly.
She had publicly expressed hope that she would eventually be able to announce no evidence of active disease.
That hope became reality when she addressed the Breast Cancer Research Foundation luncheon.
The Announcement Came 610 Days After Her Diagnosis
On October 16, 2026, Thurston attended the Breast Cancer Research Foundation’s annual Symposium & Awards Luncheon in New York City.
During her speech, she reflected on how dramatically life had changed since receiving her diagnosis on February 13, 2025.
She spoke about the difficult decisions that followed and the importance of medical research in creating more treatment options.
Then she made a personal contribution to the organization.
Thurston announced a donation of $610, representing the number of days since her diagnosis.
The amount was symbolic, connecting each dollar to another day she had lived with the disease.
She then revealed publicly that she currently had no evidence of disease.
The announcement drew applause from the audience.
In an October 16 report, People described the emotional moment, including Thurston’s gratitude toward the researchers and supporters whose work helps make newer treatments possible.
The news was also shared through Bachelor Nation’s official coverage.
For Thurston, the milestone marked a dramatic change from the uncertainty surrounding her initial diagnosis.
What Does ‘No Evidence of Disease’ Mean?
The phrase no evidence of disease, often abbreviated NED, is used when available examinations and tests do not identify detectable cancer.
Depending on the patient’s circumstances, those tests may include imaging, physical examinations, laboratory testing and other assessments.
It is an important clinical finding.
But it is not the same as proof that every cancer cell has been eliminated.
Medical imaging has detection limits.
Cancer cells may be present in numbers too small to be identified by available tests.
That is one reason doctors distinguish between a current absence of detectable disease and a permanent cure.
The National Cancer Institute’s explanation of cancer remission notes that remission can mean signs and symptoms of cancer have decreased or disappeared.
Complete remission means that all detectable signs and symptoms have disappeared.
However, even complete remission does not necessarily mean that cancer has been cured.
The distinction is especially important for metastatic breast cancer.
A patient may reach a point where scans show no visible disease while continuing treatment intended to keep the cancer controlled.
That is a meaningful achievement, even without a guarantee about the future.
Why Stage IV Breast Cancer Is Usually Considered Incurable
When breast cancer has spread to distant organs, doctors generally cannot guarantee that treatment will eliminate every cancer cell permanently.
Even when visible tumors disappear, microscopic cancer cells may remain.
Those cells may stay inactive for a period or eventually begin growing again.
This possibility is why metastatic breast cancer is generally treated as a long-term condition requiring ongoing medical management.
The goal of treatment is often to control the disease for as long as possible, relieve symptoms, preserve quality of life and extend survival.
For some patients, that control can last for years.
Treatment may involve changing medications when a therapy stops working or when side effects become difficult to manage.
A person may also need regular scans and blood tests to monitor for changes.
Thurston has previously explained that she expects treatment to remain part of her life.
Her October announcement does not change the fact that she has a history of stage IV breast cancer.
It means that her current medical assessments have produced a highly encouraging result.
A Positive Scan Can Be Both a Celebration and a Reminder of Uncertainty
Cancer patients and their families often live between medical appointments.
A scan may determine whether treatment is continuing to work or whether the care plan needs to change.
That waiting period can be emotionally exhausting.
Some patients describe anxiety before scans, sometimes called scanxiety.
Even when previous results have been favorable, the possibility of a new finding can make the next appointment stressful.
A report showing no evidence of disease may bring enormous relief.
But the relief can exist alongside the knowledge that additional monitoring will be necessary.
Those emotions are not contradictory.
A person can celebrate a major treatment response while recognizing that the future remains uncertain.
Thurston’s announcement reflects that reality.
She has reached a milestone worth celebrating, but the medical meaning of the result should not be overstated.
Why Breast Cancer Research Matters for Patients Living With Metastatic Disease
During her speech, Thurston emphasized the importance of continued research.
Her experience demonstrates why new treatments matter to people whose cancer has spread beyond the original tumor.
Over the past several decades, scientists have identified biological features that help determine which therapies may work for different breast cancers.
Hormone-receptor status and HER2 status are among the characteristics used to guide treatment.
For certain patients, targeted medications have improved disease control and expanded treatment options.
But not every patient responds to the same therapy.
And a medication that works initially may eventually become less effective.
Researchers continue studying why cancers develop resistance and how additional treatments might overcome it.
The Breast Cancer Research Foundation supports research into breast cancer prevention, detection, treatment and metastasis.
Thurston’s donation and public remarks connected her personal milestone with that broader scientific effort.
Her message was not simply that treatment had worked for her.
It was that continued research may give more patients additional options and more time.
Younger Women Can Develop Breast Cancer Too
Thurston was only 34 when she received her diagnosis.
Her experience challenges the assumption that breast cancer is exclusively a disease of older women.
Risk generally increases with age, and most breast cancers occur in women older than 50.
But younger women can develop the disease.
Some may have inherited genetic risk factors.
Others develop breast cancer without a known family history.
Thurston has described discovering a lump that persisted for months before she sought medical evaluation.
Her experience is a reminder that a new breast symptom deserves attention regardless of age.
The American Cancer Society’s guidance on breast cancer signs and symptoms identifies a new lump or mass as a possible warning sign.
Other symptoms can include swelling, skin changes, nipple changes or unusual discharge.
Most breast changes are not cancer.
But women should not dismiss a persistent or concerning change simply because they are younger than the usual age for routine screening.
Screening and Diagnostic Testing Are Not the Same Thing
For women at average risk, the U.S. Preventive Services Task Force recommends screening mammograms every two years from ages 40 through 74.
Other professional organizations recommend somewhat different screening schedules.
Women at higher risk may need earlier or more intensive screening.
But those recommendations concern routine screening for people without symptoms.
Someone who discovers a new lump or another concerning breast change needs medical evaluation regardless of whether she has reached the recommended screening age.
That may involve a clinical examination, diagnostic imaging or a biopsy, depending on the circumstances.
Thurston’s experience illustrates why this distinction matters.
She wasn’t undergoing routine mammography when the concern began.
She noticed a persistent change and eventually sought medical care.
Her story should not be used to suggest that every woman in her 20s or 30s needs the same screening schedule as an older adult.
It reinforces the importance of recognizing symptoms and discussing personal risk with a healthcare professional.
Treatment Decisions Are Highly Individual
Thurston has shared substantial information about her cancer care, including medication changes, surgery and the effects of treatment on her daily life.
But her experience should not be treated as a treatment plan for every person with metastatic breast cancer.
Cancer treatment depends on numerous factors.
These can include tumor biology, where the cancer has spread, previous treatments, overall health, medication tolerance and individual goals.
For example, hormone-receptor-positive, HER2-negative breast cancer may be treated differently from HER2-positive or triple-negative disease.
Surgery may be appropriate in selected circumstances but not others.
Medication schedules and monitoring requirements also vary.
A patient should not stop or change treatment because someone else has reached no evidence of disease.
Decisions about continuing, adjusting or pausing therapy require individualized discussion with the treating oncology team.
The Emotional Side of Living With Metastatic Cancer
Thurston has been unusually open about the emotional challenges associated with her diagnosis.
She has discussed fear, medical fatigue and the difficulty of making decisions while navigating ongoing treatment.
She has also shared moments of happiness, travel and ordinary life with her husband.
That combination is important.
People living with metastatic cancer are not defined solely by their medical appointments or scan results.
They may continue working, traveling, spending time with loved ones and making plans.
At the same time, they may face uncertainty that others around them don’t fully understand.
A favorable scan can bring relief without eliminating the emotional weight of the diagnosis.
Families can support someone in that situation by listening, respecting their preferences and avoiding assumptions about how they should feel.
Some patients want to celebrate every positive result.
Others prefer to process the news privately.
Neither response is wrong.
Why Words Matter When Reporting Cancer Milestones
When a public figure announces a major health update, headlines often use phrases such as cancer-free, beat cancer or cured.
Those descriptions can be misleading if they go beyond what the person’s medical team has actually established.
For someone with metastatic breast cancer, the difference is particularly important.
No evidence of disease describes what current testing can detect.
Cure suggests that the cancer has been permanently eliminated.
Those are not interchangeable statements.
Thurston announced no evidence of disease.
She did not announce that her stage IV breast cancer had been cured.
Preserving that distinction respects both the significance of her achievement and the realities of metastatic cancer care.
It also helps readers understand why someone may continue treatment and monitoring after receiving an extremely positive scan result.
A Milestone Worth Celebrating Without Misunderstanding It
Katie Thurston’s October announcement represents an important moment in her cancer journey.
In February 2025, she learned that she had breast cancer.
Soon afterward, she discovered that the disease had spread to her liver.
She faced difficult treatment decisions, medication adjustments, surgery and the emotional burden of living with metastatic disease.
Now, more than 600 days after her diagnosis, she has publicly shared that available testing shows no evidence of disease.
That is significant news.
It reflects an encouraging response to treatment and offers a reason for Thurston, her family and supporters to celebrate.
But it does not erase the original stage IV diagnosis or guarantee that cancer will never return.
For patients and families navigating metastatic breast cancer, her story illustrates both the possibilities created by modern treatment and the uncertainty that can remain even after excellent results.
And that may be the most important lesson of her announcement.
A person doesn’t have to be declared cured for a medical milestone to be meaningful.
Sometimes, the absence of detectable disease is itself an extraordinary reason for hope.
Original reporting and medical resources
- People — Katie Thurston Says She Has No Evidence of Disease Amid Stage 4 Breast Cancer Journey, October 16, 2026
- Bachelor Nation — Katie Thurston Reveals She Officially Has No Evidence of Disease, October 16, 2026
- ELLE — Katie Thurston Made a Surprise Announcement at the Breast Cancer Research Foundation Luncheon, October 16, 2026
- National Cancer Institute — Cancer Prognosis and Remission
- Breast Cancer Research Foundation — Research and Patient Education
- American Cancer Society — Breast Cancer Signs and Symptoms