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Heather Symons, MD MHS
- Clinical Director, Pediatric Blood and Marrow Transplant
- Associate Professor of Oncology
Telomere Clinic at Johns Hopkins
Experts include pediatric and adult doctors who specialize in hematology, oncology and genetics as well as a specialized bone marrow transplantation approach for patients with short telomere syndromes. The Telomere Clinic at Johns Hopkins has been at the forefront of coordinating care across disciplines including immunology, gastroenterology, hepatology and liver transplantation, and pulmonary medicine and lung transplantation teams among others.
The Telomere Clinic is one arm of the Telomere Center at Johns Hopkins, a translational program which serves national needs to advance patient care in this area of medicine.
Our Multidisciplinary Approach
Telomere conditions can affect many parts of the body, so we coordinate care across many disciplines. This includes immunology, digestive and liver care (gastroenterology and hepatology), liver transplant, lung care (pulmonary medicine), and lung transplant, among others.
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410-955-3071
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Our Team
Treatments
Timing of treatment
Most patients do not require treatment for many years, and the focus is avoiding unnecessary and harmful interventions. Telomere length can be useful in helping to assess the risk for each patient and individualizing the surveillance and treatment program.
Stem cell transplant/Bone marrow transplant
Treatment for severe bone marrow failure and/or primary immunodeficiency due to short telomere syndromes is bone marrow/stem cell transplantation, in which a patient’s bone marrow and immune system are replaced with that of a healthy donor’s. Reduced intensity transplant offers new, safer options for patients with short telomere syndromes, including dyskeratosis congenita and Hoyeraal-Hreidarsson syndrome.
A new trial funded by the Maryland Stem Cell Foundation is studying earlier timing of transplant to allow for consideration of other complications of short telomere syndromes such as the risk of subsequent liver disease and need for liver transplantation. Building on long-standing experiences at Johns Hopkins Kimmel Cancer Center, this study is also examining the options of half-matched stem cell donors ensuring virtually every individual has a donor.
Lung and liver transplantation
Johns Hopkins physicians have one of the longest standing experiences in lung and liver transplantation for short telomere syndromes (Silhan et al. Eur Respir J 2014, Gorgy et al. Chest 2015 and Oseini et al. Liver Transpl 2021 and others).
Innovative new lung transplant protocols that overcome new complications were developed here and disseminated across the world (Shah and Armanios Eur Respir J 2025).
Telomere center at johns hopkins Resources
Translational studies in the Telomere Center at Johns Hopkins have transformed understanding the clinical manifestations and management of affected patients:
Symptoms of the Short Telomere Syndromes
Treatment-Related Resources
- Successful reduced intensity bone marrow transplant
- Clinical trial studying earlier timing of bone marrow transplant for bone marrow failure and immunodeficiency (clinicaltrials.gov)
- Liver transplant following BMT
- Innovative lung transplant protocol to overcome complications