The place of myeloid growth factors in the treatment of hairy-cell leukaemia.

A patient with hairy-cell leukaemia was treated with granulocyte colony stimulating factor lenograstim (Granocyte) 300 micrograms daily by subcutaneous injections. His pre-existing neutropenia remitted and the therapy was continued for a total of 4 months. When the therapy was discontinued the neutropenia returned. There was no evidence that the growth factor itself had any disease modifying activity.