Classification
Although not a malignant neoplasm like other cancers, MPDs are classified within the hematological neoplasms.
There are four main myeloproliferative diseases, which can be further categorized by the presence of the Philadelphia chromosome:
| Philadelphia Chromosome "positive" | Philadelphia Chromosome "negative" |
|---|---|
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In 2001, the World Health Organization classified "chronic eosinophilic leukemia / hypereosinophilic syndrome" and chronic neutrophilic leukemia under "Chronic myeloproliferative diseases".
Read more about this topic: Myeloproliferative Disease