Abstract
Objective: Among cases in which cancer was non-detectable in mammography (MMG), in those in which the location occupied by the breast cancer was the cause of non-detection, we examined the positioning of MMG as well as the necessity of breast echography (US).
Methods: For patients in whom cancer was not detected, we compared mammograms over the past 3 years with those taken in the outpatient setting.
Results: We found that positioning was the cause of non-detection. There was a lack of imaging area in the outer region for the craniocaudal (CC) and mediolateral-oblique (MLO) directions.
Conclusions: For patients who have high risk of cancer based on family medical history, we consider it necessary to study positioning and establish a system enabling the combination of US with MMG to be recommended.
