February 3, 2026
In the world of oncology, diagnoses often come with more questions than answers. This is especially true for rare cancers. With fewer specialists, limited resources, and inadequate treatment options, navigating a rare cancer diagnosis can feel overwhelming. That’s where Barbara Van Hare, a rare cancer patient advocate and president of Pattern.org at the Rare Cancer Research Foundation (RCRF) steps in. “There are so many moving parts with oncology care, and even more for rare cancer patients,” says Barbara. “It’s crucial for clinicians, researchers, patients, and patient advocates to work together if we want to make a meaningful impact.”
Barbara’s introduction to rare cancer and patient advocacy began with her family. In 1959, when she was just two years old, her father was diagnosed with mouth cancer. More than 60 years later, Barbara’s brother was diagnosed with glioblastoma multiforme, the deadliest form of brain cancer. He was given 18 months to live, but thanks to a revolutionary clinical trial, he is still alive today. Several years after her brother’s diagnosis, Barbara’s nephew, Mark Laabs, was living in China when he suddenly lost vision in his right eye. He was diagnosed with uveal melanoma, a rare cancer with a 50% chance of metastasizing.
This was her third experience with cancer—and it wouldn’t be her last. Barbara herself would later be diagnosed with multiple melanomas and then with chronic lymphocytic leukemia (CLL). These five cancers appeared entirely unrelated, but under the surface they shared a common thread.
A patient-centric platform
While undergoing treatment, Barbara’s nephew, Mark, realized that although therapies for common cancers had substantially evolved, the needle had barely moved in 25 years for rare cancers. Every year, cancer touches millions of lives worldwide, and rare cancers comprise about a quarter of all cancers. Yet researchers know very little about the biological mechanisms underlying rare cancers, primarily because tissue samples are often inaccessible. To advance rare cancer research, researchers need access to both clinical data and tissue samples—and patients are often eager to provide it when they understand the potential benefits and the safeguards in place.
Recognizing his story and experience could help others, Mark decided to turn his cancer journey into something that would make a real impact for rare cancer patients. In 2014, he established the Rare Cancer Research Foundation (RCRF), a non-profit organization dedicated to building infrastructure to help cure rare cancers.
RCRF bridges the critical gap between patients and the research community by working with rare cancer patients and their care teams at hospitals across the U.S. RCRF helps patients donate their tissue samples directly to researchers who want to study their specific type of cancer.
At RCRF, Barbara leads the organization’s patient advocacy team and manages tissue and data collection for their donation platform, pattern.org. These programs are driven by patient-powered collaboration that enable patients to accelerate the pace of rare cancer research, while providing researchers with tissue samples and clinical data that will advance our understanding of rare cancers. Patients can choose to send their samples directly to the researcher or store the samples in RCRF’s Pattern Biobank for future research. Patients also have the option to donate their biological data, including genomic data and other medical records, to the Pattern Data Commons, RCRF’s open-source platform that brings together rare cancer data from across research institutions.
Together, these tools provide researchers with access to a database of biological samples, biological and genomic data, and medical history that will accelerate rare cancer research, while putting the patient first. “In order to find new therapies, researchers need to find a pattern across tissue data and medical data,” says Barbara. “But at our core, we’re a patient-centered organization. We’re giving power back to the patient. We are trying to build something where patients can drive the work, and where foundations and others can work together to support both the patients and the researchers.”
The power of knowledge
In addition to facilitating both tissue sample and medical record donations, RCRF also raises awareness of, and connects patients to genomic sequencing services. Whole-genome sequencing and whole-exome sequencing can provide critical insights into genetic changes underlying cancer, but for most rare cancer patients, sequencing lies out of reach, beyond the standard of care. RCRF advocates on behalf of rare cancer patients by educating healthcare providers about the importance of genomics.
Barbara herself never would have thought of getting genetic testing if not for her nephew Mark’s intuition to have his cancer lesions tested. Mark’s results showed a rare germline mutation in the POT1 gene. Mutations in the POT1 gene have been found to increase a person’s risk for cutaneous melanoma, chronic lymphocytic leukemia, angiosarcoma, and gliomas—three of which either Barbara, her nephew, or her brother had been diagnosed with.
Unfortunately, many physicians are still unaware of recent advances in hereditary cancer research and rare mutations such as POT1. And although studies suggest about 10% of melanomas are hereditary, most clinicians still assume that their patients’ melanoma must be due to sun exposure. In fact, when Barbara was diagnosed with her second melanoma (she has had several melanomas to date) and requested genetic testing—citing both her family history and her nephew’s POT1 mutation—her dermatologist dismissed her, told her she was overreacting, and attributed her cancer solely to sun exposure. But Barbara’s gut feeling was correct: she sought genomic sequencing elsewhere, and the results confirmed she also had the POT1 mutation. Because of this knowledge, Barbara now undergoes more frequent screenings for cancers associated with this mutation.
As scientific understanding of rare germline mutations and their connection to cancer continues to grow, patients like Barbara stand to benefit from an expanding landscape of clinical trials. “Genomic sequencing technology will fast-track insights into rare cancers,” says Barbara. “As we educate more patients and clinicians on this need, there will be significant potential to identify targeted treatments and advance personalized medicine for rare cancer patients. Every part of the oncology ecosystem needs to work together to solve these hard problems.”
Mark Laabs passed away in early 2024. He set forth a visionary course for RCRF and the rare cancer community, and Barbara and the RCRF team continue to honor his legacy each day by fulfilling his vision to provide rare cancer patients and their families hope for the future.
Barbara Van Hare is a patient advocate. The Illumina Global Patient Advocacy team works with patients, families, carers, and the groups that represent them to build evidence and advocate for the positive impact of genomics utilization. Patient advocates may be compensated for their time when sharing their stories. Their stories are a testimonial of the potential impacts and benefits genomics can have on rare diseases. One person’s experience is not predictive of results in all cases, which may differ based on a variety of factors. Results in other cases may vary.
