The pathology of invasive breast cancer. A syllabus derived from findings of the National Surgical Adjuvant Breast Project (protocol no. 4).

The inter-relationships of 32 pathologic and 7 clinical parameters encountered in the study of 1000 examples of invasive breast carcinoma have been presented. In some instances the biological significance of these associations is at present unclear. In others it is to be noted that there is no information provided as to the rank of their significance. Nevertheless, the associations that were encountered not only help further characterize the various forms of breast cancer but also provide information regarding the possible biological significance of some of their features. Although it is not our intention to minimize the possible significance of the inter-relationships of pathologic parameters, most emphasis in the summarizing statements which follow has been placed upon those correlations which may relate to prognosis. In this regard reference has been made to short-term treatment failure, vis a vis local recurrence and/or metastases, which may not necessarily accurately reflect patient survival, although generally such a relationship exists. Information in this regard as well as to the rank of the significance of these pathologic features shall be forthcoming when sufficient time has elapsed since the inception of this study to allow for such conclusions, i.e. survival or long-term treatment failure rates. Lastly, it becomes evident that the guidelines followed in the examination of these specimens appear to represent at least the minimum requirements necessary for a meaningful pathologic evaluation of breast carcinoma.