Squamous Cell Carcinoma of the Breast: Three Case Reports.

Three cases of squamous cell carcinoma of the breast, initially diagnosed by fine needle aspiration cytology, are presented. The first case was a 49-year-old woman with a T1 tumor located in the lower outer quadrant of the left breast. Ultrasonography revealed a cystic tumor. Aspiration cytology suggested squamous cell carcinoma (SCC). Mastectomy was performed. Histological examination revealed a pure SCC. The second case was a 40-year-old woman with a T1 tumor located in the upper outer quadrant of the right breast.Ultrasonography showed a cystic tumor and aspiration cytology revealed SCC. A quad-rantectomy was performed. Histological examination revealed predominant SCC with an adeno-carcinoma component. Estrogen receptor (ER) was negative. The patient received postoperative radiation. Thirteen months after the first operation,a salvage mastectomy was performed because of local recurrence. The third case was a 61-year-old woman with a T1 tumor located in the upper outer quadrant of the right breast. Ultrasonography showed a solid tumor. Aspiration cytology revealed both SCC and adenocarcinoma. Wide excision was performed. Histological examination revealed pre-dominant SCC with foci of adenocarcinoma. ER was negative. She received postoperative radiation. The three patients are alive and disease-free 10 to 54 months after operations