U.S. flag

An official website of the United States government

GTR Home > Conditions/Phenotypes > Thrombocytopenia 1

Thrombocytopenia 1

Synonyms
THROMBOCYTOPENIA, X-LINKED, 1; Thrombocytopenia, X-linked; X-linked thrombocytopenia with normal platelets
Modes of inheritance
X-linked recessive inheritance (Orphanet)

Summary

Excerpted from the GeneReview: WAS-Related Disorders
The WAS-related disorders, which include Wiskott-Aldrich syndrome, X-linked thrombocytopenia (XLT), and X-linked congenital neutropenia (XLN), are a spectrum of disorders of hematopoietic cells, with predominant defects of platelets and lymphocytes caused by pathogenic variants in WAS. WAS-related disorders usually present in infancy. Affected males have thrombocytopenia with intermittent mucosal bleeding, bloody diarrhea, and intermittent or chronic petechiae and purpura; eczema; and recurrent bacterial and viral infections, particularly of the ear. At least 40% of those who survive the early complications develop one or more autoimmune conditions including hemolytic anemia, immune thrombocytopenic purpura, immune-mediated neutropenia, rheumatoid arthritis, vasculitis, and immune-mediated damage to the kidneys and liver. Individuals with a WAS-related disorder, particularly those who have been exposed to Epstein-Barr virus (EBV), are at increased risk of developing lymphomas, which often occur in unusual, extranodal locations including the brain, lung, or gastrointestinal tract. Males with XLT have thrombocytopenia with small platelets; other complications of Wiskott-Aldrich syndrome, including eczema and immune dysfunction, are usually mild or absent. Males with XLN have congenital neutropenia, myeloid dysplasia, and lymphoid cell abnormalities.
Full text of GeneReview (by section):
Summary
GeneReview Scope
Diagnosis
Clinical Characteristics
Genetically Related (Allelic) Disorders
Differential Diagnosis
Management
Genetic Counseling
Resources
Molecular Genetics
References
Chapter Notes
Authors:
Sharat Chandra
Lucas Bronicki
Chinmayee B Nagaraj
view full author information

Available tests

68 tests are in the database for this condition.

Check Related conditions for additional relevant tests.

Clinical tests (68 available)

Molecular Genetics Tests

Genes See tests for all associated and related genes

  • Also known as: IMD2, SCNX, THC, THC1, WASP, WASPA, WAS
    Summary: WASP actin nucleation promoting factor

Clinical features

Help
Imported from Human Phenotype Ontology (HPO)

Show allHide all

IMPORTANT NOTE: NIH does not independently verify information submitted to the GTR; it relies on submitters to provide information that is accurate and not misleading. NIH makes no endorsements of tests or laboratories listed in the GTR. GTR is not a substitute for medical advice. Patients and consumers with specific questions about a genetic test should contact a health care provider or a genetics professional.