SEER is an authoritative source of information on cancer incidence and survival in the United States. SEER currently collects and publishes cancer incidence and survival data from population-based cancer registries covering approximately 28 percent of the U.S. population.
RA is any of a group of anemic conditions not associated with another disease and is marked by a persistent, frequently advanced anemia that can only be successfully treated with blood transfusions. RA is only anemia.
The early cells that develop into red bloodcells have an abnormal appearance (called dysplasia). The number of very early cells (called blasts) is normal (less than 5%).
The peripheral blood smear usually shows normochromic, normocytic, or normochromic macrocytic. Blasts are rarely seen and, if present, account for <1% of the white bloodcells.
The erythroid precursors in the BM vary from decreased to markedly increased. The BM must show unequivocal evidence of dysplasia (dysplasia must be present in 10% or more erythroid precursors). Ring sideroblasts may be present. The BM biopsy is generally hypercellular.
Refractoryanemia (RA) is a specific type of myelodysplasticsyndrome that is characterized mainly by unilineage dysplasia affecting erythroid series. (Diagnosis of exclusion).
The principle sites of involvement are the peripheral blood and bone marrow.
There should be a period of observation of six months followed by a re-evaluation before a definitive diagnosis of RA is established.
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.