Name
Chronic eosinophilic leukemia, NOS
ICD-O-1 Morphology
9883/3: Eosinophilic leukemia
Effective
1978 - 1991
ICD-O-2 Morphology
9880/3: Eosinophilic leukemia
Effective
1992 - 2000
ICD-O-3 Morphology
Effective
2001 and later
Reportable
for cases diagnosed
1978 and later
Primary Site(s)
C421
Primary site must be bone marrow (C421). Blood and bone marrow are always involved. Damage to a number of organs: heart, lungs, central nervous system (CNS), skin, gastrointestinal tract, spleen and liver are common.
Coding Manual:
Hematopoietic Coding Manual (PDF)
Abstractor Notes
HES is traditionally treated with prednisone. Second-line drugs are interferon or hydroxyurea which induce remission in the majority of patients. If the prednisone. interferon and hydroxyurea are not effective, the patient may receive various chemotherapeutic drugs.
For more information, see the NCI website: https://www.cancer.gov/types/myeloproliferative/hp/chronic-treatment-pdq#section/_101
For more information, see the NCI website: https://www.cancer.gov/types/myeloproliferative/hp/chronic-treatment-pdq#section/_101
Diagnostic Confirmation
This histology can be determined by positive histology (including peripheral blood) with or without genetics and/or immunophenotyping. Review the Definitive Diagnostic Methods, Immunophenotyping and Genetics Data sections below, and the instructions in the Hematopoietic Manual for further guidance on assigning Diagnostic confirmation.
Grade
Not Applicable
Module Rule
None
Alternate Names
CEL
Chronic eosinophilic leukemia
HES
Hypereosinophilic (idiopathic) syndrome
Hypereosinophilic syndrome
L-HES
Lymphocytic variant hypereosinophilic syndrome
Definition
Chronic eosinophilic leukemia (CEL) not otherwise specified (NOS), is a myeloproliferative neoplasm (MPN) in which an autonomous, clonal proliferation of eosinophil precursors results in persistently increased numbers of eosinophils in the peripheral blood, bone marrow, and peripheral tissues, with eosinophilia being the dominant hematological abnormality. Organ damage occurs as a result of leukemic infiltration, or of the release of cytokines, enzymes, or other proteins by the eosinophils.
For a diagnosis of CEL, NOS to be made, there should be evidence for clonality of myeloid cells or an increase in myeloblasts in the peripheral blood or bone marrow.
In many cases, it is impossible to prove clonality; in such cases, providing there is no increase in blast cells, the diagnosis of idiopathic hypereosinophilic syndrome (HES) is made.
The patient must have a sustained absolute eosinophil count greater than 500/pl that persists longer than six months. The physician excludes reactive eosinophilia, eosinophilia secondary to other neoplasms including T-cell neoplasia and other myeloid disorders. If above excludes peripheral blood blasts >2%, bone marrow >5% but <19%.
Diagnostic criteria for chronic eosinophilic leukemia, NOS
1. Eosinophilia (eosinophil count greater than or equal to 1.5 x 10 (9)/L)
2. WHO criteria for BCR-ABL1-positive chronic myeloid leukemia, polycythemia vera, essential thrombocythemia, primary myelofibrosis, chronic neutrophilic leukemia, leukemia, chronic myelomonocytic leukemia and BCR-ABL1-negative atypical chronic myeloid leukemia ARE NOT MET.
3. No rearrangement of PDGFRA, PDGFRB or FGFR1, and no PCM1-JAK2.
4. Blast cells constitute less than 20% of the cells in the peripheral blood and bone marrow marrow, and inv(16)(p13.1q22), t(16;16)(p13.1;q22), t(8;21)(q22;q22.1) and other diagnostic features of acute myeloid leukemia are ABSENT.
5. There is a clonal cytogenetic or molecular genetic abnormality
OR blast cells account for greater than or equal to 2% of cells in the peripheral blood or greater than or equal to 5% in the bone marrow.
For a diagnosis of CEL, NOS to be made, there should be evidence for clonality of myeloid cells or an increase in myeloblasts in the peripheral blood or bone marrow.
In many cases, it is impossible to prove clonality; in such cases, providing there is no increase in blast cells, the diagnosis of idiopathic hypereosinophilic syndrome (HES) is made.
The patient must have a sustained absolute eosinophil count greater than 500/pl that persists longer than six months. The physician excludes reactive eosinophilia, eosinophilia secondary to other neoplasms including T-cell neoplasia and other myeloid disorders. If above excludes peripheral blood blasts >2%, bone marrow >5% but <19%.
Diagnostic criteria for chronic eosinophilic leukemia, NOS
1. Eosinophilia (eosinophil count greater than or equal to 1.5 x 10 (9)/L)
2. WHO criteria for BCR-ABL1-positive chronic myeloid leukemia, polycythemia vera, essential thrombocythemia, primary myelofibrosis, chronic neutrophilic leukemia, leukemia, chronic myelomonocytic leukemia and BCR-ABL1-negative atypical chronic myeloid leukemia ARE NOT MET.
3. No rearrangement of PDGFRA, PDGFRB or FGFR1, and no PCM1-JAK2.
4. Blast cells constitute less than 20% of the cells in the peripheral blood and bone marrow marrow, and inv(16)(p13.1q22), t(16;16)(p13.1;q22), t(8;21)(q22;q22.1) and other diagnostic features of acute myeloid leukemia are ABSENT.
5. There is a clonal cytogenetic or molecular genetic abnormality
OR blast cells account for greater than or equal to 2% of cells in the peripheral blood or greater than or equal to 5% in the bone marrow.
Definitive Diagnostic Methods
Bone marrow biopsy
Clinical diagnosis
Genetic testing
Peripheral blood smear
Genetics Data
Immunophenotyping
None
Treatments
Chemotherapy
Hematologic Transplant and/or Endocrine Procedures
Hormone therapy
Immunotherapy
Surgery
Transformations to
Transformations from
None
Same Primaries
Corresponding ICD-9 Codes
205.1 Chronic myeloid leukemia
Corresponding ICD-10 Codes
D47.1 Chronic myeloproliferative disease
Corresponding ICD-10-CM Codes (U.S. only)
D47.1 Chronic myeloproliferative disease (effective October 01, 2015 - September 30, 2020)
D72.110 Hypereosonophilic syndrome [HES] (effective October 01, 2020)
D72.111 Lymphocytic Variant Hypereosonophilic Syndrome [LHES] (effective October 01, 2020)
D72.118 Other Hypereosonophilic syndrome (effective October 01, 2020)
D72.119 Hypereosonophilic syndrome (effective October 01, 2020)
Signs and Symptoms
Progression and Transformation
None
Epidemiology and Mortality
Sources
Swerdlow SH, Campo E, Harris NL, Jaffe ES, Pileri SA, Stein H, Thiele J (Eds):
WHO Classification of Tumours of Haematopoietic and Lymphoid Tissues (Revised 4th edition)
IARC: Lyon 2017
Section: Myeloproliferative neoplasms
Pages: 54-56
WHO Classification of Tumours of Haematopoietic and Lymphoid Tissues (Revised 4th edition)
IARC: Lyon 2017
Section: Myeloproliferative neoplasms
Pages: 54-56
International Classification of Diseases for Oncology, Third Edition, Second Revision. Geneva: World Health Organization, 2020.
Section: ICD-O-3.2 (2020) Morphological Codes
Pages: http://www.iacr.com.fr/index.php?option=com_content&view=category&layout=blog&id=100&Itemid=577
Section: ICD-O-3.2 (2020) Morphological Codes
Pages: http://www.iacr.com.fr/index.php?option=com_content&view=category&layout=blog&id=100&Itemid=577
National Cancer Institute
Section: General Information About Myeloproliferative Neoplasms
Pages: https://www.cancer.gov/types/myeloproliferative/hp/mds-mpd-treatment-pdq
Section: General Information About Myeloproliferative Neoplasms
Pages: https://www.cancer.gov/types/myeloproliferative/hp/mds-mpd-treatment-pdq