A case of adenomyoepithelioma combined with invasive ductal carcinoma of the breast

• Published in: Nihon Rinsho Geka Gakkai Zasshi (Journal of Japan Surgical Association) Vol. 69; no. 12; pp. 3074 - 3078
• Main Authors: SUWA, Hirofumi, YASUMIZU, Ryoji, TACHIBANA, Tsuyoshi, KONDO, Shohei, IMAMURA, Takashi, OHSHIO, Gakuji
• Format: Journal Article
• Language: Japanese
• Published: Japan Surgical Association 2008
• ISSN: 1345-2843; 1882-5133
• DOI: 10.3919/jjsa.69.3074

A 70-year-old woman developed a tumor measuring 7.5×6.5 cm in the AC area of the left breast. On mammography, a lobulated, high density mass with a microlobulated margin, which was classified as belonging to category 4 was detected. On ultrasound, an irregular, low echoic mass with ill-defined borders and heterogeneous contents was found. On fine needle aspiration cytology, the mass was diagnosed as an adenomyoepithelioma. Concurrent ductal carcinoma of the breast was also identified. A modified radical mastectomy with an axillary dissection was done. On histopathology, the adenomyoepithelioma was seen in the center of the tumor, and it was surrounded by both scirrhous carcinoma and ductal carcinoma in situ. Adenomyoepithelioma is a breast tumor in which two layers of cells proliferate, it is usually considered to be a benign tumor. This is the fourth case in Japan in which invasive ductal carcinoma of the breast coexisted with adenomyoepithelioma in the same breast. At present, the patient is alive without recurrence or metastasis 2 years postoperatively.