Dyskeratosis congenita

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Dyskeratosis congenita
X-linked recessive.svg
Synonyms Zinsser-Cole-Engman syndrome
Pronounce
Specialty Hematology, Genetics
Symptoms Skin pigmentation, nail dystrophy, oral leukoplakia
Complications Bone marrow failure, cancer, pulmonary fibrosis
Onset Childhood or adolescence
Duration Lifelong
Types N/A
Causes Genetic mutations (e.g., DKC1, TERT, TERC)
Risks Family history
Diagnosis Genetic testing, clinical evaluation
Differential diagnosis Aplastic anemia, Fanconi anemia, idiopathic pulmonary fibrosis
Prevention Genetic counseling
Treatment Hematopoietic stem cell transplantation, androgen therapy, supportive care
Medication Androgens, growth factors
Prognosis Variable, depends on severity and complications
Frequency Rare
Deaths N/A


Dyskeratosis congenita (DC) is a rare, inherited disorder characterized by the triad of abnormal skin pigmentation, nail dystrophy, and leukoplakia. It is a form of bone marrow failure syndrome and is associated with an increased risk of cancer and other medical complications.

Genetics[edit | edit source]

Dyskeratosis congenita can be inherited in an X-linked recessive manner, as well as in autosomal dominant and autosomal recessive patterns. The X-linked form is caused by mutations in the DKC1 gene, which encodes the protein dyskerin. Dyskerin is involved in the maintenance of telomeres, the protective caps at the ends of chromosomes.

Diagram of X-linked recessive inheritance pattern.

Clinical Features[edit | edit source]

The classic triad of clinical features in dyskeratosis congenita includes:

  • Abnormal skin pigmentation: This often presents as reticular (net-like) hyperpigmentation, primarily on the neck and upper chest.
  • Nail dystrophy: Patients may have thin, ridged, and brittle nails that may eventually be lost.
  • Oral leukoplakia: White patches on the mucous membranes of the mouth that cannot be scraped off.

Additional features may include:

Diagnosis[edit | edit source]

Diagnosis of dyskeratosis congenita is based on clinical findings, family history, and genetic testing. Telomere length measurement can also aid in the diagnosis, as patients with DC often have very short telomeres.

Management[edit | edit source]

Management of dyskeratosis congenita involves regular monitoring and supportive care. Treatment may include:

See also[edit | edit source]

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Contributors: Prab R. Tumpati, MD