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9 - Grade/differentiation unknown, not stated, or not applicable
Refractory anemia with excess blasts in transformation
RAEB-1 (Type 1) and RAEB-2 (Type 2) are defined based on the number of blasts: 1. RAEB-1: 5-9% blasts in bone marrow, < 5% blasts in blood 2. RAEB-2: 10-19% blasts in bone marrow (note if 5-19% blasts in blood and < 10% blasts in marrow, should be RAEB-2 OR RAEB with Auer rods). aka RAEB-T (RAEB in transformation which has ICD-O-3 code of 9984/3)
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
Code 9984/3 in ICD-O-3 is for: RAEB-T (Refractory anemia with excess blast in transformation). This code became obsolete effective 1/1/2010. Any cases noted to be RAEB-T for diagnosis dates 1/1/2010 and forward should be coded to 9983/3.