Microinvasive breast carcinoma carries an excellent prognosis regardless of the tumor characteristics.

The clinical implication of microinvasive breast carcinoma (MIBC), especially when multiple foci are identified, is still not clearly defined. This study is designed to collect clinicopathologic and follow up data on patients with MIBC. Histologic data including invasive breast cancer type, nuclear grade, number of microinvasive foci and lymph node status, as well as associated in situ component histologic and biomarkers parameters were recorded.