Cancers arising from the haematopoietic and lymphoid tissue comprise a
heterogeneous group of malignancies with diverse clinical and biological features.
The World Health Organization (WHO) classification of Haematopoietic and
Lymphoid tissue, classified these cancers based on histologic characteristics.
Lymphoid neoplasms are divided into precursor, mature indolent B-cell, mature
aggressive B-cell, mature T- and NK-cell, plasma cell, and Hodgkin lymphoma.
Myeloid neoplasms are divided into myeloproliferative, myelodysplastic,
myeloproliferative/myelodysplastic neoplasms, acute myeloid leukaemia, and other
acute leukaemias. Furthermore, a group of histiocytic and dendritic cell neoplasms
is specified. All mature B-cell neoplasms (minus plasma cell neoplasm) and all Tand
NK-cell neoplasms together are called non-Hodgkin lymphomas (NHL).
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