Metastatic Breast Carcinoma Presenting as Perforated Appendicitis.

SUMMARY: BACKGROUND: Patients presenting with symptoms from unknown metastatic breast carcinoma are becoming increasingly uncommon. Perforated appendicitis from metastatic breast carcinoma is a rare entity with only a few published reports in the literature. CASE REPORT: The case of a 76-year-old female patient who developed perforated appendicitis from previously unknown metastatic breast cancer is presented.