Telomere biology disorders as an example of rare disease advocacy.

Patient advocacy has emerged as a transformative force within the rare disease landscape. Few rare diseases illustrate this dynamic as clearly as telomere biology disorders (TBDs). Once regarded primarily as rare pediatric bone marrow failure syndromes, TBDs are now understood as multisystem, lifelong conditions affecting individuals across the age spectrum. In this review, we examine TBDs as a case study in rare disease advocacy, highlighting how advocacy has functioned not only as a support mechanism but as an organizing architecture underpinning progress across diagnosis, management, research, and community engagement. We describe how advocacy efforts have advanced diagnostic awareness and access to validated testing, informed the development and dissemination of clinical management guidelines, enabled multidisciplinary models of care, and fostered robust research ecosystems through funding, registries, and collaborative convenings. We further explore the essential role of advocacy in addressing psychosocial needs, sustaining patient engagement, and confronting persistent inequities in access, representation, and care delivery. The TBD experience demonstrates that advocacy is not ancillary to science, but integral to its progress and impact. As the field enters a new era characterized by expanding diagnoses and emerging therapies, the TBD community offers a scalable framework for integrating advocacy as a core component of rare disease ecosystems.