The biology and management of dyskeratosis congenita and related disorders of telomeres

Hemanth Tummala, Amanda J. Walne, Inderjeet Dokal
In: Expert Review of Hematology · 2022 · vol. 15(8) , pp. 685–696 · doi:10.1080/17474086.2022.2108784 · PMID:35929966 · W4289957207
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This paper reviews the clinical features, genetics, and biology of dyskeratosis congenita and related telomere biology disorders, alongside expert views on diagnosis and management.

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Abstract

BACKGROUND: Dyskeratosis congenita (DC) is a multisystem syndrome characterized by mucocutaneous abnormalities, bone marrow failure, and predisposition to cancer. Studies over the last 25 years have led to the identification of 18 disease genes. These have a principal role in telomere maintenance, and patients usually have very short/abnormal telomeres. The advances have also led to the unification of DC with a number of other diseases, now collectively referred to as the telomeropathies or telomere biology disorders. WHAT IS COVERED: Clinical features, genetics, and biology of the different subtypes. Expert view on diagnosis, treatment of the hematological complications and future. EXPERT VIEW: As these are very pleotropic disorders affecting multiple organs, a high index of suspicion is necessary to make the diagnosis. Telomere length measurement and genetic analysis of the disease genes have become useful diagnostic tools. Although hematological defects can respond to danazol/oxymetholone, the only current curative treatment for these is hematopoietic stem cell transplantation (HSCT) using fludarabine-based conditioning protocols. New therapies are needed where danazol/oxymetholone is ineffective and HSCT is not feasible.

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