Purpura thrombocytopenic M31.1; M69.61(Thrombozytopenie)

Author: Prof. Dr. med. Peter Altmeyer

All authors of this article

Last updated on: 15.02.2021

Dieser Artikel auf Deutsch

Synonym(s)

Purpura in thrombocytopenia; Thrombocytopenic purpura

Definition
This section has been translated automatically.

Polyätiological, microangiopathic, mostly small spotted purpura (petechiae) caused by thrombocytopenia of varying aetiology and severity.

Etiopathogenesis
This section has been translated automatically.

The causes of thrombocytopenia include:

  • educational disorders:
    • Diminished megakaryocytopoiesis:
      • Congenital
      • Acquired: E.g. by drugs, radiotherapy, chemicals, viruses, bacterial infections.
      • Displacement: E.g. by bone marrow carcinosis, leukemia, malignant lymphomas (e.g. plasmocytoma), osteomyelofibrosis.
    • Ineffective thrombocytopoiesis: e.g. Wiskott-Aldrich syndrome.
  • Increased degradation or consumption:
    • Immunological:
      • Primary autoantibody formation: e.g. idiopathic thrombocytopenic purpura.
      • Secondary autoantibody production: e.g. drugs, collagenosis, immune complex diseases, antiphospholipid antibody syndrome).
    • Non-immunological:
      • E.g. disseminated intravascular coagulation.
  • distribution disorders:
    • E.g. platelet pooling in the spleen for splenomegaly.

Clinical features
This section has been translated automatically.

The clinical picture of thombopenic purpura (platelet count <140,000/ul) is characterized by orthostatic, indistinct, (fine-spotted - nonpalpable) petechial hemorrhages (hemorrhage: verification by diascopy - easily performed by firm thumb compression of the skin ). Capillary damage is often present at the same time. In case of a recurrent course of the orthostatic petechial hemorrhages, there are two-dimensional pigmentations due to hemosiderin deposits.

In advanced thrombocytopenia, there may be planar hemorrhages. Linear patterns in scratch marks (purpura factitia) are also possible. In these cases, clarification of an existing coagulation disorder is always required.

Frequently, thrombocytopenia is not known, as there is usually no risk of bleeding as long as the number of functional thrombocytes is > 30,000/ul and plasmatic coagulation is normal.

Therapy
This section has been translated automatically.

  • Varies depending on the triggering cause.
  • Avoid a triggering drug. Depending on the clinic and platelet count, systemic glucocorticoids are indicated, e.g. prednisone (e.g. Decortin) initial 100 mg/day, gradual reduction according to clinic.
  • The treatment of thrombocytopenia is a treatment to be carried out under internal control.

Note(s)
This section has been translated automatically.

The thrombocytopenic purpura should not be confused with the Moschcowitz syndrome, the thrombotic thrombocytopenic purpura.

Disclaimer

Please ask your physician for a reliable diagnosis. This website is only meant as a reference.

Authors

Last updated on: 15.02.2021