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Updated: Feb 12, 2026

Single-Port Robotic-assisted Transaxillary Breast-conserving Surgery: A Prospective, Single-arm, Non-randomized Phase IIa Clinical Trial
Published on: August 19, 2025
[Successful Breast Conserving Surgery for Simultaneous and Ipsilateral Multiple Breast Carcinomas of Young Patient -
Hitomi Kubota1, Keita Adachi, Shuhei Suzuki
1Division of Breast and Endocrine Surgery, Dept. of Surgery, Nihon University School of Medicine.
Abstract:
We report a case of a simultaneous and ipsilateral multiple breast carcinoma.The patient was 35-year-old woman.She was noticed a breast lump on her right breast, and visited our hospital.Mammography showed a tumor accompanied by spiculation on her right breast.Ultrasonography revealed 2 tumors with irregular margins, 23mm in diameter and 12mm in diameter, and were observed on C area of her right breast.The continuity of the 2 tumors was not clear.Core needle biopsies for each breast tumors led to a diagnosis.The pathological diagnosis was invasive ductal carcinoma.We checked up whole body. There was no metastatic lesion.We performed breast conserving surgery and sentinel node biopsy.The pathological diagnosis was invasive ductal carcinoma, positive for estrogen receptor and progesterone receptor, negative for HER2/neu.The Ki-67 positive cell index was 30%.The surgical margin was negative.We diagnosed T2N0M0=Stage II A.She was started the endocrine therapy by LH-RH agonist and tamoxifen.Four years after surgery, she was well without metastases.
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