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Blood and bone marrow are always involved. At least 2 types of blood counts are low and have an abnormal appearance under the microscope (dysplasia). The number of blasts is less than 5%.
This histologycode also includes childhod MDS. MDS is very rare in children. Both the peripheral blood and bone marrow are involved.
For MDS diseases (9980, 9982, 9983, 9985, 9986, 9989, 9991, 9992), abstracting each of the subtypes would result in over-counting of the diseases.
1. Code only the first subtype that is diagnosed.
2. Do not change the histologycode or create a new abstract for any subsequent specific MDS subtypes.