Table 1: Summary of patients.

No. Location Age Operation Breast size Excision size %(1) Breast density on MMG(2) Suction drain Hospital stay Postoperative complication Cosmetic result(3) 1 CD 65 Bp + SNB, Ax Small 7.2 × 6.8 cm 30% Heterogeneously dense 10 days 14 days Delayed wound healing Excellent 2 A 41 Bq + SNB Small 7.5 × 6.7 cm 30% Heterogeneously dense 2 days 6 days Excellent 3 C 58 Bq + SNB Small 7 × 5 cm 30% Heterogeneously dense 3 days 7 days Excellent 4 CD 36 Bq + Ax Small 7.5 ×7.5 cm 30% Heterogeneously dense 8 days 11 days Excellent 5 EAC 43 Bp + SNB Small 8 × 7 cm 30% Heterogeneously dense 3 days 9 days Excellent 6 A 38 Bq + SNB Small 8 × 7 cm 30% Heterogeneously dense 3 days 6 days Good 7 CD 44 Bq + SNB Small 9.5 × 7 cm 30% Heterogeneously dense 3 days 6 days Bleeding Fair 8 AB 48 Bq + SNB Small 9.5 × 9.2 cm 30% Heterogeneously dense 3 days 7 days Fat necrosis Poor 9 C 44 Bq + SNB Small 11 × 9 cm 40% Heterogeneously dense 4 days 7 days Delayed wound healing Excellent 10 C 42 Bq + SNB, Ax Small 13 × 10 cm 40% Heterogeneously dense 6 days 10 days Excellent 11 C 56 Bq + SNB, Ax Small 15 × 9 cm 40% Heterogeneously dense 10 days 14 days Bleeding (re-operation) Excellent 12 CD 60 Bp + SNB Moderate 6.5 × 6.5 cm 20% Heterogeneously dense 5 days 8 days Excellent 13 CD 54 Bq + Ax Moderate 12 × 8 cm 30% Heterogeneously dense 10 days 14 days Excellent* 14 C 46 Bq + SNB Moderate 13 × 9 cm 40% Heterogeneously dense 4 days 9 days Fair 15 C 40 Bq + SNB Moderate 14 × 8.5 cm 40% Heterogeneously dense 10 days 13 days Bleeding Poor 16 A 36 Bq + SNB Moderate 14 × 11.5 cm 40% Heterogeneously dense 2 days 7 days Fat necrosis Fair 17 C 30 Bq + SNB Large 10 ×10 cm 20% Heterogeneously dense 4 days 8 days 　 Excellent

(1)Excision volume compared to the total breast volume was estimated by using the photograph of preoperative marking of a partial resection area. (2)Breast density was classified into four categories based on the Breast Imaging Reporting and Data System (BI-RADS). (3)The cosmetic result was evaluated based on photographs taken one year after the operation. *The cosmetic result of 2 years after the operation was down to be good.