The results of a questionnaire survey for current diagnosis and treatment of ductal carcinoma in situ (DCIS) in Japan

Recently, detection rate of DCIS (Ductal Carcinoma In Situ) has gradually increased because mammography screening has been prevailed among 40's in Japan and stereotactic vacuum-assisted breast biopsy for nonpalpable lesion had been approved under Government Health Insurance since April, 2004. We performed nationwide survey for DCIS. It showed detection rate of DCIS in 2005 was 10.9%. Breast conserving surgery was performed 65% among DCIS cases. Lymphnode dissection was done for 27.2% of total cases. Sentinel node biopsy is one of the key procedures to avoid unnecessary axillary dissection. The indication of postoperative radiation and hormone therapy should be clarified based on clinical trials in the near future. (author)