At 49, Karen Peterson was diagnosed with triple-negative breast cancer. Two years later it was stage IV, with a prognosis measured in months. Karen tells Stephanie Sirota how biomarker testing and a Phase 1 immunotherapy trial saved her life, why she walked out on her original oncologist, and what underrepresentation in clinical trials looks like up close. She also explains how Karen's Club, a New York City nonprofit and 2026 grantee partner of the RTW Foundation, helps patients of color use their own test results to make informed decisions about trials. PODCAST TEAM Producer: Devon Leaver Editor: Dominique GuerraProduction Coordinator: YingYu LinProduction Support: Annabelle ChanResearch Consultant: Chris Liu, Senior Research Analyst, RTW InvestmentsStory Consultant: Sarah Garwood, Director of Community Engagement, RTW FoundationFeaturing: Karen Peterson, Founder and Chief Patient Advocate, Karen's Club, moderated by Stephanie Sirota, Partner and Chief Business Officer, RTW Investments. FOLLOW US Love our podcast? Follow us on LinkedIn at RTW Investments, LP and check out our website for the latest updates and insights. To make sure you never miss an episode, you can subscribe to the RTW podcast on Spotify, Apple Podcasts, Amazon Music, and most other podcast platforms. CHAPTERS 00:00 - Introduction 01:03 - Diagnosed at 49 02:36 - The vow, and an unannounced visit 04:54 - The immunotherapy trial that saved her life 06:19 - From patient to advocate 08:35 - Who to tell, who to lean on 09:52 - Leaving her oncologist 12:05 - Patients who ran out of time 14:14 - Fear, trust, and the first call 16:02 - Why representation shapes the data 17:17 - The positive impact of peer navigation 18:08 - Working with clinicians 18:59 - How Karen's Club works 20:03 - A CAR T success story 21:38 - The RTW Foundation partnership 22:54 - What decision makers should know 23:26 - Outro DISCLAIMER This interview was given by Karen Peterson, Founder and Chief Patient Advocate of Karen's Club, a 2026 grantee partner of the RTW Foundation, and moderated by Stephanie Sirota, Partner and Chief Business Officer at RTW Investments. Statements reflect RTW's views and opinions as of the date hereof and not as of any future date. All expressions of opinion are subject to change without notice and are not intended to be a forecast of future events or results. The views expressed by guests are their own, and their appearance on the program does not imply an endorsement of them or any entity they represent.