The results of management of ductal carcinoma in situ with limited surgery and radiotherapy are presented at a median follow-up of 92 months. In 44 treated breasts the actuarial 10-year loco-regional control rate was 91%, four patients having recurred. Each loco-regional failure was due to invasive carcinoma and three of the affected patients have developed metastases. No patient developed metastases without previous clinically-evident invasive loco-regional disease. The 10-year disease-specific survival rate was 96%. Previous publications have shown that the 25% or greater risk of local failure after limited excision of ductal carcinoma in situ can be reduced by irradiation of the breast. Our results demonstrate that good loco-regional control is maintained in the longer term.