Figure 1

Various types of lobular neoplasia; (a) ALH with dyshesive small cells involving and partially filling terminal ductal lobular unit (hematoxylin and eosin × 20); (b) LCIS similar cells like in ALH but the cells fill and expand the terminal ductal lobular unit (hematoxylin and eosin × 20); (c) PLCIS with expanded back-to-back ducts filled with large pleomorphic dyshesive and apocrine cells with central necrosis and microcalcifications resembling ductal carcinoma in situ (hematoxylin and eosin × 10). ALH, atypical lobular hyperplasia; LCIS, lobular carcinoma in situ; PLCIS, pleomorphic lobular carcinoma in situ.