HISTOLOGIC FEATURES PREDICTIVE OF AN INCREASED RISK OF EARLY LOCAL RECURRENCE AFTER TREATMENT OF BREAST-CANCER BY LOCAL TUMOR-EXCISION AND RADICAL RADIOTHERAPY
A histopathologic review was undertaken of 293 patients with breast cancer treated by local tumor excision and radical radiotherapy. In a 6-year period, there were 37 local treatment failures with 16 deaths, and an additional 20 patients died without local recurrence. Pathologic data were available for 272 patients. Multivariate analysis indicated that the pathologic features in an invasive tumor most predictive for local recurrence were the combination of a high proportion of intraduct carcinoma with extensive necrosis (comedocarcinoma). Of 18 patients with these features, nine have had early local recurrence (a risk of 50% with these features vs 10% in those without), and four have died (a risk of 22% against 12%). Despite the short follow-up, the results already appear significant, and the study is ongoing. The importance of comedonecrosis in the intraduct component as a prognostic indicator in invasive carcinoma of the breast is not widely recognized and might constitute a relative contraindication to conservative treatment of the breast.