A Case Report of Breast Abscess Caused by Peptoniphilus harei after Endoscopic Breast-Conserving Surgery for Breast Cancer and Literature Review

Abstract Background Breast abscess is a common infectious disease of the breast, but a breast abscess caused solely by Peptoniphilus harei is extremely rare. Endoscopic breast-conserving surgery for breast cancer is an emerging breast surgical technique that is considered a clean surgery with a low postoperative infection rate. Case Presentation We report a case of a patient who underwent endoscopic breast-conserving surgery for breast cancer and developed a breast abscess in the surgical area after radiotherapy. Bacterial culture and identification confirmed that the abscess was caused by P. harei infection. After treatment with antibiotics targeting P. harei and active wound debridement, the patient recovered well. Conclusions This is the first reported case of a breast abscess caused solely by P. harei after endoscopic breast-conserving surgery for breast cancer. Early identification of the pathogen and targeted treatment are crucial for successful management.