Micro-invasive breast carcinoma with granulomatous stromal response

Two cases of micro-invasive breast carcinoma with granuloma formation associated with invasive foci are presented. This is an unusual feature which may aid in the recognition of stromal micro-invasion. Micro-invasive carcinomas are defined as predominantly non-invasive tumours in which there are one or more foci of infiltration, none measuring more than 1 mm in maximum diameter.