On Rare

Excruciating pain after even brief sun exposure, years without answers, and a life-threatening liver crisis shaped Ashley's journey with erythropoietic protoporphyria (EPP), a rare genetic condition that causes severe photosensitivity. Although Ashley experienced symptoms beginning in early childhood, she wasn't diagnosed until after her 40th birthday, when she was hospitalized with advanced liver disease ultimately requiring a transplant. In this episode of On Rare, David Rintell, Head of Patient Advocacy at BridgeBio, and Mandy Rohrig, Vice President of Patient Advocacy at BridgeBio, speak with Ashley about her decades-long diagnostic journey, the emotional experience of waiting for a donor organ, and...

Severe seizures, nonstop crying, and an exaggerated startle reflex marked the beginning of Elliott’s journey with molybdenum cofactor deficiency type A (MOCD type A), an ultra-rare inherited metabolic disorder that can cause devastating neurological damage shortly after birth. After initially being told that Elliott would likely not survive to school age, his family was offered access to an experimental treatment that changed the course of his life. In this episode of On Rare, David Rintell, Head of Patient Advocacy at BridgeBio, and Mandy Rohrig, Senior Director of Patient Advocacy at BridgeBio, travel to England to meet Elliott and hi...

Seizures, incorrect diagnoses, and years of unanswered questions shaped Arielle’s journey with autosomal dominant hypocalcemia type 1 (ADH1). ADH1 is a rare genetic condition in which the body is unable to accurately sense blood calcium levels, leading to hypoparathyroidism. Although she grew up aware that her calcium levels were low, she did not receive a formal diagnosis until age 16, when a severe calcium crash led to a seizure and ultimately revealed the underlying cause. Years later, when her young son Sebastian began experiencing seizures, Arielle recognized familiar warning signs of abnormal calcium levels. Despite a known family history of ab...

In this episode of On Rare: Innovators, hosts David Rintell, Head of Patient Advocacy at BridgeBio, and Mandy Rohrig, Senior Director of Patient Advocacy at BridgeBio, speak with Kat Bryant Knudson, Founder and CEO of the Speak Foundation and a leader in the limb-girdle muscular dystrophy (LGMD) community. Diagnosed as a child after experiencing early symptoms of muscle breakdown, Kat spent years searching for answers before receiving a definitive genetic diagnosis. What began as a personal journey to understand her condition evolved into a lifelong commitment to ensuring that no one with LGMD faces that journey alone.

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In our 2025 year-in-review episode, On Rare reflects on a year filled with meaningful conversations and powerful storytelling. Joined by David Rintell, Head of Patient Advocacy at BridgeBio, and Mandy Rohrig, Senior Director of Patient Advocacy at BridgeBio, we revisit moments that moved us, challenged us, and reaffirmed the importance of listening to the voices of rare disease communities. This year also marked an exciting milestone with the launch of On Rare: Innovators, a new series spotlighting leaders, including patients, caregivers, scientists, and advocates, who are taking action to transform the lives of those impacted by rare disease. We are...

En el episodio inaugural de On Rare: Innovadores, una nueva serie derivada de On Rare de BridgeBio, los presentadores David Rintell, director de abogacía de pacientes de BridgeBio, y Mandy Rohrig, directora sénior de abogacía de pacientes de BridgeBio, presentan a los oyentes a las personas que están transformando la comunidad de enfermedades raras a través de la defensa de los derechos, la compasión y la acción. La serie comienza en Gijón, España, con Carmen Alonso, fundadora de la Fundación ALPE, quien ha dedicado su vida a mejorar la atención y construir...

In this episode of On Rare Innovators, Mandy Rohrig, Senior Director of Patient Advocacy at BridgeBio, and David Rintell, Head of Patient Advocacy at BridgeBio, talk with Nasha Fitter, a parent, entrepreneur, and rare disease leader whose determination was reshaped the day her daughter Amara was diagnosed with FOXG1 syndrome. Drawing on a career defined by bold pivots and purpose-driven problem solving, Nasha is challenging long-held assumptions about what small, rare disease communities can achieve. From building the FOXG1 Research Foundation to co-founding Citizen Health, she has pushed for new models of data, drug development, and patient empowerment. Nasha’s story is...

Greg’s journey with LMNA cardiomyopathy, a rare inherited heart condition, began in high school when he experienced sudden episodes of rapid, irregular heartbeats during track practice. The cause remained a mystery for years, leading to misdiagnoses and untreated disease progression. During that time, Greg faced life-threatening arrhythmias and required several implanted devices before finally receiving a heart transplant. That experience, and the challenges that came before it, ultimately inspired his passion to create change and help others facing the same uncertainty. In this episode of On Rare, David Rintell, Head of Patient Advocacy at BridgeBio, and Mandy Rohrig, Se...

In the inaugural episode of On Rare: Innovators, a new sister series of On Rare from BridgeBio, hosts David Rintell, Head of Patient Advocacy at BridgeBio, and Mandy Rohrig, Senior Director of Patient Advocacy at BridgeBio, introduce listeners to the changemakers reshaping the rare disease community through advocacy, compassion, and action. The series begins in Gijón, Spain with Carmen Alonso, founder and longtime leader of the ALPE Foundation, who has dedicated her life to improving care and building community for people and families living with achondroplasia. What began as Carmen’s personal journey as a mother seeking information and suppor...

Before she turned eight, Cerys had already faced two diagnoses, only one of which she truly understood. While being diagnosed with celiac disease as a child, unusually high CK levels in her blood pointed to a deeper issue: limb-girdle muscular dystrophy type 2I/R9 (LGMD2I/R9). In this episode of On Rare, David Rintell, Head of Patient Advocacy at BridgeBio, and Mandy Rohrig, Senior Director of Patient Advocacy at BridgeBio Gene Therapy, speak with Cerys, a 23-year-old living in Wales, about living with LGMD2I/R9. She shares how she’s navigated symptom progression, adapted to using mobility aid...

Seizures, sleepless nights, and mysterious white patches on his skin marked the beginning of Daniel’s journey with Tuberous Sclerosis Complex (TSC). Diagnosed at age 6, Daniel faced a childhood filled with MRIs, EEGs, and specialist visits, often requiring cross-country travel for coordinated care. In this moving episode of On Rare, David Rintell, Head of Patient Advocacy at BridgeBio, and Mandy Rohrig, Senior Director of Patient Advocacy at BridgeBio Gene Therapy, speak with Daniel, a 31-year-old living in Seattle, about growing up with TSC, the emotional toll of visible symptoms, and the stigma he faced from peers. He reflects on th...

Katie and Allie’s story began in childhood with unexplained clumsiness and subtle symptoms that intensified over time. After years of searching for answers, Katie was diagnosed with late-onset Tay-Sachs (LOTS), a rare neurodegenerative disease. Further testing confirmed her twin sister Allie’s diagnosis as well. Despite facing daily challenges ranging from mobility issues to emotional strain, the sisters have become passionate advocates, raising over $1 million for research and awareness. With humor, grit, and the support of their family—especially their powerhouse mom—they continue to live fully and inspire the rare disease community.

In this moving episode...

Philip’s journey with ATTR began with unexplained weight loss and gastrointestinal issues that puzzled doctors for years. Despite seeing multiple specialists, his condition remained undiagnosed until a physician at Johns Hopkins finally connected the dots, confirming ATTR. By then, Philip had lost 60 pounds and was on the brink of survival.

In today’s episode of On Rare, David Rintell, Head of Patient Advocacy at BridgeBio, and Mandy Rohrig, Senior Director of Patient Advocacy at BridgeBio Gene Therapy, speak with Philip and his wife, Sally, who has helped to navigate the frustrating medical system, advocate for answers, and...

When Julien was just 6 weeks old, Kady knew something wasn’t right. Despite more than 16 doctors insisting Julien was fine, Kady trusted her instincts and fought for answers—refusing to leave the hospital until the right tests were done. That persistence led to a life-changing diagnosis: a rare genetic form of hypoparathyroidism. Julien’s specific mutation is so unique that he is the only known case in the world. In today’s episode of On Rare, David Rintell, Head of Patient Advocacy at BridgeBio, and Mandy Rohrig, Director of Patient Advocacy at BridgeBio Gene Therapy, speak with Kady, the mother o...

In our final episode of 2024, On Rare looks back at highlights from the rewarding and rare conversations with our exceptional guests and David Rintell, Global Head of Patient Advocacy at BridgeBio and Mandy Rohrig, Director of Patient Advocacy at BridgeBio Gene Therapy. We listened, we learned, we laughed, and we cried. We are deeply grateful to all of our guests. Join us for a look back at 2024 and don’t forget to subscribe to learn more from our guests in 2025.

Charles, a recently retired cardiologist of 53 years, speaks with David Rintell, Head of Patient Advocacy at BridgeBio, and Mandy Rohrig, Director of Patient Advocacy at BridgeBio Gene Therapy, about how his unexpected early diagnosis of ATTR-CM likely impacted the trajectory of his disease. Dr. Jonathan Fox, President and Chief Medical Officer of cardiorenal programs at BridgeBio, explains how ATTR affects the heart and peripheral nervous system, and the importance of early diagnosis.  

For years, Charles suffered from numbness and tingling in both wrists and hands. Eventually, when the pain became so severe that operating a mouse for 10 to...

Erin joins David Rintell, Head of Patient Advocacy at BridgeBio, and Mandy Rohrig, Director of Patient Advocacy at BridgeBio Gene Therapy, to share her experience living with hypochondroplasia. Erin also has two sons living with hypochondroplasia and one son of average height. Raised in a loving and supportive family with a can-do attitude, her father told her that she may be of short stature but that she could do everything she wanted to do, just maybe in a slightly different way.

Erin shares her diagnostic journey with hypochondroplasia in the third grade. Even though her diagnosis was...

In today’s episode of On Rare, David Rintell, Head of Patient Advocacy at BridgeBio, and Mandy Rohrig, Director of Patient Advocacy at BridgeBio Gene Therapy, speak with Misty about her experience living with limb-girdle muscular dystrophy, type2I/R9 (LGMD2I/R9). Misty details the suffering she experienced in her childhood from bullying for the symptoms she now realizes are connected to LGMD2I/R9 and shares the many frustrations and significant challenges that resulted from her delayed diagnosis. Despite noticing alarming symptoms as early as junior high school, Misty was dismissed by medical professionals for years. Finally, an...

In this emotional episode of On Rare, David Rintell, Head of Patient Advocacy at BridgeBio, and Mandy Rohrig, Director of Patient Advocacy at BridgeBio Gene Therapy, speak with Dawn, the single parent of Vayle, a 5-year-old girl living with Canavan Disease. Dawn shares how she came to realize that Vayle was not meeting developmental milestones at 3-4 months old. Despite initial reassurance from her pediatrician, Dawn’s maternal intuition proved correct, leading to a diagnosis of Canavan Disease during Vale’s 6-month checkup. Dawn was told that Vayle might not live beyond the age of ten.

Dawn reco...

Sean joins David Rintell, Head of Patient Advocacy at BridgeBio, and Mandy Rohrig, Director of Patient Advocacy at BridgeBio Gene Therapy to share his journey with ATTR. In this episode, Sean describes his initial symptoms, which included carpal tunnel syndrome and numbness in his foot and ankle, the misdiagnosis he experienced, and his eventual diagnosis at the Cleveland Clinic in Abu Dhabi. While the diagnosis was a relief it was also difficult to accept and took an emotional toll on him and those around him. Sean has found this to be a common experience of many diagnosed with ATTR...

Alex joins David Rintell, Head of Patient Advocacy at BridgeBio, and Mandy Rohrig, Director of Patient Advocacy at BridgeBio Gene Therapy, to speak about her son, Hudson. Before Hudson’s birth, Alex and her husband learned that Hudson would be born with hypochondroplasia. A genetic counselor helped her to understand the diagnosis. Although Alex is a medical professional, she had never heard of this condition, and the many unknowns of this new diagnosis left Alex feeling scared. However, all these fears were put aside when she held Hudson for the first time. At five days old, Hudson had breathing pr...

Alex joins David Rintell, Head of Patient Advocacy at BridgeBio, and Mandy Rohrig, Director of Patient Advocacy at BridgeBio Gene Therapy, to speak about her son, Hudson. Before Hudson’s birth, Alex and her husband learned that Hudson would be born with hypochondroplasia. A genetic counselor helped her to understand the diagnosis. Although Alex is a medical professional, she had never heard of this condition, and the many unknowns of this new diagnosis left Alex feeling scared. However, all these fears were put aside when she held Hudson for the first time. At five days old, Hudson had breathing pr...

In part two, Eric continues talking about his experience living with Transthyretin Amyloidosis (ATTR) with David Rintell, Head of Patient Advocacy at BridgeBio, and Mandy Rohrig, Director of Patient Advocacy at BridgeBio Gene Therapy. Eric recalls the surprise he experienced when a routine doctor’s visit led to him, within hours, to undergoing a heart transplant. Though the surgery was successful, Eric describes his complex recovery from the transplant. Age, old sports injuries, and lingering ATTR symptoms all contributed to a year-long recovery process, which included a two-week stay in the hospital, followed by an acute rehabilitation facility, a fe...

Eric joins David Rintell, Head of Patient Advocacy at BridgeBio and Mandy Rohrig, Director of Patient Advocacy at BridgeBio Gene Therapy in a two-part conversation to talk about his experience of living with Transthyretin Amyloidosis (ATTR). Eric was an extremely active person who enjoyed sports, riding horses and working on his 20-acre property when he began to have issues which he now attributes to ATTR. Eric’s diagnostic journey took 14 years and as the disease progressed, he experienced two carpal tunnel surgeries, and several other cardiac procedures. In fact, by the time he was diagnosed, Eric could not walk th...

Join David Rintell, Head of Patient Advocacy at BridgeBio and Mandy Rohrig, Director of Patient Advocacy at BridgeBio Gene Therapy as they recognize Rare Disease Day, February 29, 2024, by speaking with siblings of people living with rare conditions. It is often said that a rare condition or disease impacts the entire family, and this is particularly true for rare siblings. Due to the extra care needed by a child living with a rare condition, rare siblings may sometimes miss out on time or attention from their parents. Rare siblings often contribute to caregiving in their families. Though being a rare...

Becoming a parent to a child with a rare disease was extremely isolating for Effie. In the second episode of our two-part series with Effie, she shares that finding the world of podcasts, documenting similar experiences to her own, was magical. Effie explains how important it is to find others who "get it" and how this feeling of belonging changed everything for her. As Effie explains, “In this community of rare disease families, every story matters, every effort counts, and every heart is connected. We are stronger together and are empowered by the love that guides us.” She describes her...

Effie Parks, a rare mom, a patient advocate, a podcaster, and host of “Once Upon a Gene” joins David Rintell, Head of Patient Advocacy at BridgeBio to share her story. Recorded during the 2023 Global Genes Conference in San Diego, Effie talks about her journey into motherhood and into the rare community. Effie’s son, Ford, was born with CTNNB1 syndrome, an extremely rare genetic condition. Isolated and trying to navigate her new life as a rare mom, Effie stumbled across Two Disabled Dudes and on first listen, realized she now had a community who understood her experiences. With this new un...

In our final episode of 2023, On Rare looks back at the wonderful, rare conversations with our extraordinary guests and David Rintell, Global Head of Patient Advocacy at BridgeBio. Mandy Rohrig, Director of Patient Advocacy at BridgeBio Gene Therapy and host of On Rare, walks us through highlights from the year. We listened, we learned, we laughed and we cried. Join us for a look back at 2023 and don’t forget to subscribe to learn more from our guests in 2024.

Jay joins David Rintell, Head of Patient Advocacy at BridgeBio to talk about his experience of living with erythropoietic protoporphyria (EPP). When Jay was very young, it was difficult to receive a diagnosis for his condition. It took a series of visits to various doctors, including psychiatrists, before a pediatric dermatologist diagnosed him at six years old. The symptoms of EPP are often invisible, which can make diagnosis quite difficult. With vulnerability and clarity, Jay explains that although he may look like everyone else, part of his daily mental energy is utilized managing and planning how to limit his...

Dan joins David Rintell, Head of Patient Advocacy at BridgeBio to share the story of his long diagnostic odyssey and how ultimately a cancer scare attributed to his LGMD2I/R9 diagnosis. Dan shares that, during this time, he felt relief receiving a diagnosis, but it was quickly paired with the fear of facing the unknown of a progressive neuromuscular disease.  

Dan describes the challenges of traveling, living alone and developing the constant fear of falling. Fiercely independent, Dan is concerned about the future. Living with a progressive condition means that you are always forced to adapt a...

32 seconds. That’s how much time Brady could tolerate exposure to light on his skin before the onset of deep burning, itching pain. Brady is living with erythropoietic protoporphyria, EPP, a rare inherited disorder that causes the skin to become painful when exposed to sunlight. Seconds, minutes, or hours beyond 32 seconds, for Brady, could result in intense, prolonged pain, which would require hours or days in darkness to recover.

Kristen, Brady’s mother, shares with David Rintell, Head of Patient Advocacy at BridgeBio, how Brady was diagnosed, and how he manages the effects of the condition. EPP affe...

Anne and Mike continue their conversation with David Rintell, Head of Patient Advocacy at BridgeBio, in part two of our autosomal dominant polycystic kidney disease (ADPKD) episode. Anne describes her recovery from the first kidney transplant along with the complications she attributes to her two native kidneys which were not removed during the initial surgery and issues with polycystic liver disease. In the 11 years following, Anne endured an operation to remove her native kidneys, followed by a double organ transplant, giving her both a new liver and kidney. Her first kidney transplant was generously gifted by a friend. However...

Anne joins David Rintell, Head of Patient Advocacy at BridgeBio to talk about how autosomal dominant polycystic kidney disease (ADPKD) has impacted her and the lives of her family members. ADPKD weaves through the branches of Anne’s family tree for generations. When Anne was only six years old, her father died at 46 of ADPKD related kidney failure, dialysis, and kidney transplantation. Two of Anne’s five siblings have ADPKD. One had a successful kidney transplant, but another sibling died while on the waiting list for a new kidney. Anne wasn’t surprised by her ADPKD diagnosis at age 25 and wa...

Lacey joins David Rintell, Head of Patient Advocacy at BridgeBio to talk about how LGMD2I/R9 has impacted her life. When Lacey was 16, she was diagnosed with a progressive neuromuscular disease, known as LGMD. The only question she had for the doctor was whether she could one day become a mother. Without additional explanation, she was told that LGMD2I would keep her from having children. For years, Lacey lived in denial. Despite the limitations of her disease, she charged ahead with her life. She runs a business with her husband. She is a wife, mother, and foster...

Kristen joins David Rintell, Head of Patient Advocacy at BridgeBio to tell her personal story about living with achondroplasia and how she became an advocate at just six years old. By third grade, Kristen was speaking to classrooms about what it is like to live with achondroplasia. In the episode, Kristen shares how she has dealt with health issues, overcame adversity and even published her story in the book, Little Legs, Big Heart. She explains that achondroplasia isn’t just about height – there are other important quality of life concerns which she has learned to address, while also helping othe...

Veronica joins David Rintell, Head of Patient Advocacy at BridgeBio to tell her son Brent’s story. When Brent was nine, his family discovered that he had a rare genetic disease called Pantothenate Kinase-Associated Neurodegeneration (PKAN), a condition without any available treatments. Veronica shares how she and her family have supported Brent as he has stubbornly and victoriously succeeded in giving his valedictorian speech in high school, attended community college, and started a local gelato business.

Mallory Harden, Ph.D., Director of Business and Operations at CoA Therapeutics, a BridgeBio company, provides an overview of PKAN...

In part two of our series on ALS, amyotrophic lateral sclerosis, Holly and Beth, two women whose husbands died from ALS, (also known as Lou Gehrig’s disease) continue their conversation with David Rintell, head of patient advocacy at BridgeBio. They describe the bond they developed over their shared experience and how they continue to offer support to others who have experienced an ALS diagnosis.

Listen to part one to hear Rachel Groth, Ph.D., vice president and head of neuroscience research at BridgeBio, provide an overview of ALS, a fatal neurodegenerative disease that affects nerve cells in...

Holly and Beth, two women whose husbands died from ALS, amyotrophic lateral sclerosis, (also known as Lou Gehrig’s disease) join David Rintell, head of patient advocacy at BridgeBio to share their experience. ALS is a progressive and fatal neurodegenerative disease that affects nerve cells in the brain and spinal cord.

Rachel Groth, Ph.D., vice president and head of neuroscience research at BridgeBio, provides an overview of ALS. She explains how this devastating disease is characterized by the selective and progressive loss of motor neurons, which are cells in the body and brain controlling mus...

The birth of Jihan’s first daughter, Bella, was traumatic. She and her husband were totally unprepared for the diagnosis of congenital adrenal hyperplasia (CAH) and struggled with the way the news was delivered to them. Their health care providers failed to provide adequate instructions about the care of a baby who is fragile due to adrenal insufficiency. The first two weeks of Bella’s life were frightening, as her parents tried to get the care that she needed and learn how to care for her at home. Twelve years later, Jihan’s youngest daughter, Alessia was also born with C...