The fittest founder in the room got cancer. Here’s how he used AI to fight back.

Conno Christou is no stranger to precision. A dedicated health enthusiast, he meticulously tracks his sleep using a Whoop band and an Oura ring, and he undergoes comprehensive blood tests annually, adhering to the methodologies of renowned longevity experts like Peter Attia and Rhonda Patrick. At just 35, while launching his second startup, he was well-versed in the latest health advancements. His last health assessment in 2025 showed optimal results, leading him to believe he was on the right track. However, a routine workout led to alarming symptoms when his arm swelled. Initially dismissing it, he eventually sought medical advice, which revealed two blood clots requiring surgery. But pre-operative tests uncovered an unexpected and grave discovery: an 11-by-11-by-8 centimeter mass behind his sternum, which turned out to be an aggressive form of non-Hodgkin’s lymphoma — a rare condition that affects about one in 420,000 individuals, resulting from a random genetic mutation unrelated to lifestyle factors. Fortunately, this tumor had only existed for a brief period, and if undetected, it would have progressed significantly within weeks. "Lucky in my unluckiness," Christou reflected from his home in Athens. His journey through the medical system would soon reveal both the challenges and possibilities that lay ahead. The first oncologist he consulted recommended a milder chemotherapy regimen, but before starting treatment, Christou sought a second opinion. The second specialist advised a more aggressive course of action, which increased his chances of recovery from 60% to around 85%. As a business founder, he was accustomed to taking charge of his decisions rather than accepting the first recommendation. Over the next few days, Christou gathered twelve opinions, leveraging his professional network to consult hematologists and oncologists from around the world. The consensus favoring the more intensive treatment was overwhelming. Throughout six months of chemotherapy, Christou applied the same analytical mindset he used in business to his health. He wore his Whoop device, which accurately predicted his immune system's fluctuations, and kept a detailed symptom journal using voice notes to track every change in his condition. His strategy focused on three main aspects: sleep, nutrition, and mental resilience. He also turned to AI for assistance, feeding his health data into a chatbot named Claude. While recognizing that AI tools are not replacements for doctors, he found them invaluable for formulating the right questions and better understanding his condition. As a rare case, the chatbot's access to extensive medical literature proved more beneficial than typical online searches. Towards the end of his treatment, an ambiguous PET scan result raised concerns about potential further therapy. Christou, armed with research indicating a high false-positive rate for his type of lymphoma, sought additional opinions. Ultimately, a fourth doctor confirmed that what appeared to be active disease was merely a reactivation of his thymus gland, a common occurrence in young patients recovering from chemotherapy. As Christou reflects on the past year, he recognizes the profound impact this experience has had on his life and work. His current venture, Keragon, leverages AI to streamline administrative tasks in healthcare. However, navigating the medical system as a patient has reshaped his perspective on care delivery. He observed healthcare professionals overwhelmed with non-patient-related tasks and experienced the treatment protocols that often seemed ill-suited for younger patients. Now, Christou takes time for personal connections and self-care, valuing the importance of living in the moment. A piece of advice from a friend resonates with him: "Be happy now." He understands the challenge of this mindset but acknowledges its significance. Eager to support others facing similar health challenges, he emphasizes that the benefits of AI in patient care are not a distant future but a reality unfolding today.