Summary
Differentials
Common
- Leukemia
- Metastatic malignancy
- Hodgkin lymphoma
- Non-Hodgkin lymphoma
- Miliary tuberculosis
- Disseminated intravascular coagulation (DIC)
- Post-transfusion
- Hemolysis, elevated liver enzymes, low platelet count (HELLP)
- Cardiopulmonary bypass
- Immune thrombocytopenia (ITP)
- Systemic lupus erythematosus (SLE)
- Rheumatoid arthritis
- Antiphospholipid syndrome
- HIV/AIDS
- Malaria
- Dengue fever
- Zika virus infection
- Cytomegalovirus (CMV)
- Infectious mononucleosis
- COVID-19
- Parvovirus B19
- Sepsis
- Heparin-induced thrombocytopenia (HIT)
- Antimalarials, antiseizure drugs, antibiotics, or chemotherapies
- Alcohol ingestion
- B12 deficiency
- Folate deficiency
- Gestational thrombocytopenia
- Cirrhosis
Uncommon
- Multiple myeloma
- Bone marrow fibrosis
- Thrombotic thrombocytopenic purpura (TTP)
- Hemolytic uremic syndrome (HUS)
- Sarcoidosis
- Cyclic thrombocytopenia
- Wiskott-Aldrich syndrome
- MYH9-related disorders, including May-Hegglin anomaly
- Bernard-Soulier syndrome
- Gaucher disease
- Hashimoto thyroiditis
- Aplastic anemia
- Vaccinations
- Paroxysmal nocturnal hemoglobinuria (PNH)
- Pseudothrombocytopenia
- Familial platelet disorder with germline RUNX1 mutation
- Thrombocytopenia due to germline ANKRD26 mutation
- Thrombocytopenia due to germline ETV6 mutation
Contributors
Authors
Julia T. Geyer, MD
Associate Professor
Weill Cornell Medicine
Pathology and Laboratory Medicine
Division of Immunopathology
New York
NY
Disclosures
JTG declares that she has no competing interests.
Acknowledgements
Dr Julia T. Geyer would like to gratefully acknowledge Dr Alan E. Lichtin, a previous contributor to this topic.
Disclosures
AEL is on an advisory board and has received research support from Amgen.
Peer reviewers
Roger M. Lyons, MD, FACP
Clinical Professor of Medicine
University of Texas Health Science Center
San Antonio
Cancer Care Network of South Texas
San Antonio
TX
Disclosures
RML declares that he has no competing interests.
Jeffrey S. Wasser, MD
Clinical Assistant Professor of Medicine
University of Connecticut School of Medicine
Farmington
CT
Disclosures
JSW has received research support from Amgen, Ligand Pharmaceuticals, and MGI Pharma for clinical studies in immune thrombocytopenic purpura.
Keith R. McCrae, MD
Professor of Medicine
Case Western Reserve University School of Medicine
Cleveland
OH
Disclosures
KRM declares that he has no competing interests.
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