Does gcsf injections 2 a week for 2 1/2 years cause leukemia?

Probably not.: Gcsf is given to raise the neutrophil count. Long term use usually is for severe chronic neutropenia with high risk of infection. While gcsf use has been reported in patients who have subsequently developed leukemia, so far such reports are only in people whose underlying disease already confers such a risk. There is no convincing evidence that gcsf increases that risk.