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Historical hematology: May-Hegglin anomaly
Hidehiko Saito1, Shinji Kunishima
1Nagoya Central Hospital, Nagoya, Japan. hidehiko.saito@jr-central.co.jp
American Journal of Hematology
|November 3, 2007
Summary
May-Hegglin anomaly is a rare platelet disorder caused by mutations in the MYH9 gene, leading to giant platelets and leukocyte inclusions. Research is exploring how these MYH9 gene mutations cause diverse symptoms.
Area of Science:
- Hematology
- Genetics
Background:
- May-Hegglin anomaly is a rare autosomal dominant platelet disorder.
- Characterized by thrombocytopenia, giant platelets, and leukocyte inclusions.
Discussion:
- Mutations in the nonmuscle myosin heavy chain IIA (MYH9) gene are identified as the cause.
- Inclusion bodies are aggregates of MYH9, found only in granulocytes.
Key Insights:
- MYH9 gene mutations are responsible for May-Hegglin anomaly and related disorders.
- These disorders include Sebastian, Fechtner, and Epstein syndromes, often with additional symptoms like deafness, nephritis, or cataracts.
Outlook:
- Further research is needed to understand why inclusion bodies are absent in platelets, monocytes, and lymphocytes.
- Investigating the mechanisms by which a single MYH9 mutation leads to varied phenotypes is a key area of interest.
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