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.
A neoplasm of lymphoblasts committed to the B lineage whose blasts contain >50 and usually <66 chromosomes, typically without translocations or other structural alterations. This leukemia is common in children, accounting for about 25% of cases of B-ALL.
(This code is effective for cases diagnosed 2010 and later. For cases diagnosed prior to 2010 see codes: 9728/3 [lymphoma] or 9836/3 [leukemia].)
The presenting features are generally similar to those of other patients with ALL. Cases of T-ALL should not be included in this code even though those patients have near tetraploid karyotypes.