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Related Experiment Videos

Menstrual cyclic thrombocytopenia.

A Tomer1, A D Schreiber, R McMillan

  • 1Department of Basic and Clinical Research, Research Institute of Scripps Clinic, La Jolla, California 92037.

British Journal of Haematology
|April 1, 1989
PubMed
Summary
This summary is machine-generated.

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Menstrual cycle-related hormonal shifts may trigger cyclic thrombocytopenia by affecting antibody-coated platelet clearance. This leads to dangerous drops in platelet counts during menses.

Area of Science:

  • Hematology
  • Immunology
  • Gynecology

Background:

  • Cyclic thrombocytopenia is a rare condition where platelet counts fluctuate predictably.
  • Understanding the mechanisms behind menstrual cycle-associated platelet drops is crucial for patient management.

Observation:

  • Three patients presented with severe thrombocytopenia (platelet nadir 5-20 x 10(9)/l) coinciding with menses.
  • Symptoms included bruising, epistaxis, and menorrhagia, followed by platelet count normalization or elevation (up to 900 x 10(9)/l).
  • Bone marrow exams revealed megakaryocytic hyperplasia during thrombocytopenic periods.

Findings:

  • Platelet survival was significantly reduced during thrombocytopenia (T50=0.7 days) and increased when counts normalized (T50=3.2 days).
  • Two patients had elevated platelet-associated anti-glycoprotein Ib autoantibodies.

Related Experiment Videos

  • Increased monocyte Fc gamma receptor expression correlated with decreased platelet counts at menses onset.

    • Implications:

    • Hormonal fluctuations during the menstrual cycle may influence Fc gamma receptor-mediated platelet clearance by macrophages.
    • This mechanism could explain the pathogenesis of cyclic thrombocytopenia in susceptible individuals.
    • Further research into hormone-immune interactions is warranted for therapeutic strategies.