Abstract
Quality control is one of the most important aspects of breast cancer screening. Since mammographic screening was started by the Ibaraki Health Service Association in 1995, semi-annual conferences have been held to monitor the quality of the screening. Mammograms classified by screening between April 1998 and September 1999 as Categories 4 and 5 were discussed in a subsequent conference. Ten of those cases had been diagnosed as normal or benign in the hospitals. We requested each hospital to reconsider the cases. As a result, three cases of breast cancer were found. We emphasize here that the whole screening process must be subject to stringent quality control. Conferences allow better understanding between the screening facilities and the hospitals.
