" /> Acquired thrombocytosis - CISMeF





ICD-11 code : 3B63.1;

Preferred Label : Acquired thrombocytosis;

ICD-11 definition : A chronic myeloproliferative neoplasm that involves primarily the megakaryocytic lineage. It is characterized by sustained thrombocytosis in the blood, increased numbers of large, mature megakaryocytes in the bone marrow, and episodes of thrombosis and/or haemorrhage. Progression to a post -essential thrombocythaemia myelofibrosis stage or transformation to acute myeloid leukaemia is rarely observed.;

ICD-11 synonym : primary thrombocythaemia; thrombocythaemia; Essential thrombocythaemia; haemorrhagic thrombocythaemia; increased platelets; increased platelet count; idiopathic thrombocythaemia; platelet count above reference range; Idiopathic haemorrhagic thrombocythaemia; primary haemorrhagic thrombocythaemia; Essential thrombocytosis;

ICD-11 inclusion : Idiopathic haemorrhagic thrombocythaemia;

ICD-11 "other" category code : 3B63.1Y;

ICD-11 "unspecified" category code : 3B63.1Z;

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A chronic myeloproliferative neoplasm that involves primarily the megakaryocytic lineage. It is characterized by sustained thrombocytosis in the blood, increased numbers of large, mature megakaryocytes in the bone marrow, and episodes of thrombosis and/or haemorrhage. Progression to a post -essential thrombocythaemia myelofibrosis stage or transformation to acute myeloid leukaemia is rarely observed.

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31/07/2025


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