Leukopenia after postmastectomy irradiation

Significant peripheral white blood cell depression was noted in 75% of postmastectomy patients receiving chest wall and nodal irradiation and in 50% of patients receiving only peripheral nodal irradiation. Leukopenia was documented for as long as 36 months following therapy. With the current trend to earlier institution of chemotherapy, the routine use of postoperative irradiation must be reevaluated.