Essential thrombocythemia

Name
Essential thrombocythemia
ICD-O-3 Morphology
9962/3
Effective 2001 and later
Reportable
for cases diagnosed 2001 and later
Primary Site(s)
C421

Help me code for dx year :

Grade
9 - Grade/differentiation unknown, not stated, or not applicable
Module Rule
None
Alternate Names
Essential hemorrhagic thrombocythemia
Essential thrombocytosis
ET
Hemorrhagic thrombocythemia
Idiopathic hemorrhagic thrombocythemia
Idiopathic thrombocythemia
Idiopathic thrombocytosis
Primary thrombocythemia
Primary thrombocytosis
Thrombocythemia vera
Definition
Essential thrombocythemia is a clonal myeloproliferative neoplasm. Rare chronic blood disorder characterized by elevated platelet count. Sustained thrombocytosis in blood and increased numbers of large, mature megakaryocytes in bone marrow; clinically episodes of thrombosis and/or hemorrhage.

A diagnosis of "post essential thrombocythemia myelofibrosis" is a progression of essential thrombocythemia.
Abstractor Notes
Disease is usually suspected when the patient has a CBC or peripheral blood smear that shows an overproduction of platelets. The diagnosis is clinical (diagnosis of exclusion); the physician diagnoses this disease by excluding other myeloproliferative neoplasms and correlating those equivocal results with the patient's symptoms. Bone marrow and blood are the principle sites of involvement. The spleen does not show significant extramedullary hematopoiesis but is a sequestration site for platelets. In some cases this disorder may be progressive, and only rarely evolves into acute myeloid leukemia or myelofibrosis.

50-60% of patients will have a positive JAK2.
Definitive Diagnostic Methods
Bone marrow biopsy
Clinical diagnosis
Genetics testing
Genetics Data
JAK2
Immunophenotyping
None
Treatments
Blood thinners, anti-clotting medications, aspirin
Chemotherapy
Immunotherapy
Transformations from
No Transformations
Corresponding ICD-9 Codes
238.71 Essential thrombocythemia
Corresponding ICD-10 Codes
D47.3 Essential (hemorrhagic) thrombocythemia
Corresponding ICD-10-CM Codes (effective October 1, 2015 U.S. only)
D47.3 Essential (hemorrhagic) thrombocythemia
Signs and Symptoms
None
Diagnostic Exams
None
Recurrence and Metastases
None
Epidemiology and Mortality
None