Complication rates are lower using postoperative radiation therapy and cure rates at least compatible to preoperative radiation therapy. However, one of the concerns with postoperative radiation treatment is the possibility of delay in beginning the treatment because of an unhealed surgical wound. A delay of more than 6 weeks is detrimental. In order to study the effect of radiation therapy on incompletely healed wounds, a retrospective chart review of such cases during the period 1977 to 1984 was undertaken. One hundred and eighty-five patients had planned postoperative radiation therapy, and 13 of these began radiation therapy with an unhealed wound or fistula. Six of 10 wounds closed spontaneously, 4 required surgical closure, and 3 failed to heal. Seven patients in this study died with cancer, 2 died of other causes, 3 are alive without disease, and 1 patient remains alive with disease. We conclude that giving radiation therapy to an open wound with appropriate precaution can be done without serious complications.