In Situ Synchronous Bilateral Ductal Carcinoma—A Case Report—

Abstract

Ultrasonography detected an irregular hypoechoic lesion in the right C area in a 58-year-old woman. In addition, MRI revealed a wide-enhanced effect on the bilateral mammary gland, and malignancy could not be ruled out. Based on the core needle biopsy, ductal carcinoma in situ (DCIS) or micro invasive carcinoma was diagnosed in the right breast, with no malignancy lesion in the left breast. She was referred to our hospital for further examination and treatment. Ultrasonography revealed mammary ductal dilation in the left CDE area, and a patchy structure was also observed. Core needle biopsy was repeated, and DCIS was diagnosed. Based on the diagnosis of synchronous bilateral breast cancer, bilateral mastectomy and sentinel lymph node biopsy were performed. Histopathological findings were DCIS, ER (+), PgR (+) on the right side, DCIS, ER (-), PgR (-) on the left side, and Tis, N0, M0, and Stage 0 on both sides. The diagnosis of the contralateral mammary gland without complaints had to be carefully addressed. There are concerned regarding surgical complications and adjuvant treatment owing to the consideration of diverse surgical methods and biomarkers, followed by the selection of an appropriate treatment method is necessary.