Abstract
A 70-year-old woman received breast cancer examination. A tumor in her right breast was detected, and she received a thorough examination. Upon further examination were diagnosed bilateral tumors through ultrasound. We performed needle biopsies. And pathological findings showed mucinous carcinomas. She had neither axillary lymph node metastasis, nor distant metastasis, therefore we performed bilateral mastectomies and sentinel lymph node biopsies. From the resected specimens, pathological classification was determined to be luminal-A cancers. The patient has been treated with aromatase inhibitors as adjuvant therapy for approximately 5 years. Here we report a case of synchronous bilateral mucinous carcinoma, which is very rare in the literature.
