The system does have clinical utility; however factors such as cytogenetic status are not within the remit of the classification. For this reason, many disease entities in these groups show a great deal of heterogeneity. WHO classification
In 2001, the WHO Classification of Myeloid Neoplasms was published, classifying CMML into a new group of diseases, the myelodysplastic/myeloproliferative neoplasms (MDS/MPN), reflecting the diseases neoplastic nature. Other diseases in this category are juvenile myelomonocytic leukaemia, atypical CML; BCR-ABL1 negative and MDS/MPD unclassifiable. These MDS/MPN overlap syndromes have effective production of some lineages of blood cells, but show ineffective proliferation of other lineages. The 2008 revision of the classification moved cases of CMML with PDGFR gene translocations to a new group, myeloid/lymphoid neoplasms with eosinophilia with abnormalities of PDGFRA, PDGFRB or FGFR1. Diagnostic criteria
FAB criteria
The FAB criteria for diagnosis are as follows:
Monocyte count >1x109/L
0–19% blasts in bone marrow
<5% blasts in peripheral bloodThe FAB also arbitrarily categorises CMML into myelodysplastic-like and myeloproliferative-like groups. A white blood count of 13x109 is used as a cut-off to differentiate the two.
In medicine, granulocytosis is the presence of an increased number of granulocytes in the peripheral blood. Often, the word refers to an increased neutrophil granulocyte count (neutrophilia), but granulocytosis formally refers to the combination of neutrophilia, eosinophilia, and basophilia. Leukocytosis refers to an increase in the number of all white blood cells. Causes
Granulocytosis can be a feature of a number of diseases, including:
Infection, especially bacterial
Malignancy, most notably leukemia (it is the main feature of chronic myelogenous leukemia, CML)
Autoimmune disease

Diagnosis
Diagnosis of granulocytosis is usually done by obtaining a complete blood count. Prognostic
In cardiovascular disease, increased white blood cell counts have been shown to indicate a worse prognosis. See also
Agranulocytosis
Bandemia
Complete blood count

References


== External links ==