P173 Should positive surgical margin involvement of in situ carcinoma of invasive breast cancer after breast conserving surgery be treated with additional resection?. (April 2023) - Yoshii, Y.; Jimbo, K.; Hashiguchi, H.; Shikata, S.; Ogawa, A.; Watase, C.; Shiino, S.; Murata, T.; Yoshida, M.; Takayama, S.; Suto, A.