MPAL
From haematologyetc.co.uk
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Lineage assignments 1 - defining Myeloid lineage in MPAL
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Myeloid markers option 1 | |
Myeloperoxidase (MPO) | This marker alone is sufficient to establish myeloid lineage provided it meets the intensity definition - intensity should be at least half of that of mature neutrophils in at least of proportion of cells. |
Myeloid markers option 2 | |
If MPO does not meet criteria for myeloid lineage, then myeloid lineage may still be assigned through demonstration of monocytic lineage. This can be assigned by the detection of at least two of the following features: | |
Surface markers of monocytic lineage: CD11c, CD14, CD64 or other recognised features of monocytic differentiation: serum or urinary lysozyme or non-specific esterase (detected by enzyme cytochemistry) |
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Lineage assignments 2 - defining B-lymphoid lineage in MPAL
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Marker combination 1 | |
1. Strong expression of CD19 | To meet the definition of "strong" the expression intensity must exceed that of 50% of normal B lymphocytes |
2. plus: | There must be additional expression of at least one of the following CD10, CD22, or CD79a |
Marker combination 2 | |
If MPO does not meet criteria for myeloid lineage, then myeloid lineage may still be assigned through demonstration of monocytic lineage. This can be assigned by the detection of AT LEAST TWO of the following | |
Surface markers of monocytic lineage: CD11c, CD14, CD64 or Other recognised features of monocytic differentiation: serum or urinary lysozyme or non-specific esterase (detected by enzyme cytochemistry) |