Abstract
An 83-year-old woman was evaluated at our hospital for a painful mass in her right breast that she noticed two weeks earlier. The preoperative diagnosis was infiltrating ductal carcinoma of the breast (T2N0M0, Stage IIA). A right mastectomy and sentinel lymph node biopsy were performed. The final histopathologic diagnosis was spindle cell carcinoma of the breast (ER 0, PgR 0, HER2 score 0, Ki-67 labeling index 30-40%).
The patient and her family did not want any postoperative adjuvant therapy. She was discharged on postoperative day 7, but on day 18, she was re-evaluated for a chief complaint of malaise. Contrast CT showed multiple lung, liver, and lymph node metastases. The patient had a rapidly downhill course and died 30 days after surgery.
Spindle cell carcinoma of the breast is a rare subtype of infiltrating carcinoma, and there is no uniform consensus regarding its prognosis. This case of spindle cell carcinoma of the breast with a rapidly downhill course is reported.
