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Can Reddit and ChatGPT Give Breast Cancer Patients the Support and Information They Need?

Research overseen by Sarah Tevis, MD, looks at the effectiveness and accuracy of the online resources.

5 minute read

by Greg Glasgow | March 5, 2025
Header for Reddit's r/breastcancer subreddit

Two research studies overseen by University of Colorado Cancer Center member Sarah Tevis, MD, investigate how breast cancer patients are using social media and other digital tools for support and information about their diagnosis and treatment. 

Reddit as support group

Presented in November 2024 at the American College of Surgeons Clinical Congress, a research paper authored by CU School of Medicine student Jessie Jiang analyzed breast cancer-related posts on the social media site Reddit. A research team overseen by Tevis looked at the top 1,000 posts from the past year in the r/breastcancer subreddit and sorted them into such topics as advice, affirmation, venting, solidarity, and motivation.

Sense of solidarity

An analysis of the top posts showed that the Redditors valued receiving advice and affirmation from other patients, Tevis says, as well as having the ability to vent and say what was on their mind. 

“They felt like other patients helped motivate them either to continue with their treatment or to take care of themselves, and they also felt a sense of solidarity being part of that group,” she says.

The findings could impact the well-being support offered to CU Cancer Center patients in the future, especially around financial and emotional support, which were two of the most-discussed topics in the Reddit posts, Tevis says.

“We saw that users were talking about relationships — spouses and children — and feeling separated or lonely or frightened about what was going to happen to them and their family,” she says.

Life after treatment

Another impactful finding from the Reddit research, Jiang says, is that around 10% of posts discuss completion of treatment or life in remission. 

“This implies that breast cancer survivors have continued needs after completion of treatment and could still benefit from support,” she says. “Even in this phase of survivorship, patients experience anxiety and fear of recurrence, something that we are beginning to study.”

Jiang says she and her fellow researchers may extend their analysis of Reddit posts to include comments and responses to see what answers or resources are provided within the online forum. 

“It would be interesting to assess r/breastcancer for accuracy of content and how it aligns with current guidelines,” she adds. “It would also be important to compare topics discussed on Reddit and how they compare to the concerns of our patients in clinic.”

What ChatGPT gets wrong 

In a similar study overseen by Tevis and authored by Jakob Durden, MD, a resident in the CU Department of Surgery, researchers queried the generative artificial intelligence tool ChatGPT to see what surgical recommendations it would give for breast cancer patients at certain ages and with specific diagnoses.

“We were really interested in knowing what ChatGPT would recommend for lymph node surgery, because that's something that's been evolving over time,” Tevis says. “We are doing less and less lymph node surgery, and we have well-recognized guidelines for the clinical scenarios that Jakob used. He was looking to see if, in these very clear-cut cases, ChatGPT would recommend the correct axillary surgery — and it didn’t do a very good job.”

Not only that, Durden says, but even when asked to cite its sources, the program would either ignore the request altogether or provide nonfunctional weblinks, making it difficult for a hypothetical patient to check the accuracy of the information provided.

Helping patients interpret test results

The research is especially important to conduct now, Durden says, because recent regulation changes mean that patients typically receive test results before having the chance to review them with their clinical team. Many then turn to tools such as ChatGPT for more information.

Tevis says the findings emphasize the need for providers to point patients to accurate sources of information online. She, Durden, and other researchers also are developing an internet-compatible tool designed to provided clinician-vetted information and additional weblinks for patients who want assistance interpreting their results. 

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Sarah Tevis, MD