“…However, a wide range of distances between tumors has been reported, ranging from 1 to 5 cm 8,35,37 . Furthermore, most MF/MC cancers are defined as exclusively invasive carcinomas, including ductal and/or lobular breast cancers; however, some studies also included in situ lesions 5,7,8,12,16,20,28,35,37,38 . In addition to the non‐standardized criteria for MF/MC breast cancers, conventional mammogram and gross pathological examination seem to be unable to detect all MF/MC cancers 10,36 .…”