Two Cases of Solitary Colonic Metastasis of Breast Cancer Performed Colectomy

Abstract

Case 1. A 64-year-old woman was diagnosed with right breast cancer, ER negative and HER2 positive. Metastasis to the transverse colon was suspected by CT scan and severe stricture of the lumen was confirmed by colonoscopy. To prevent bowel obstruction, laparoscopic partial colectomy (transverse colon) was performed and colonic metastasis of breast cancer was diagnosed. The patient has been receiving postoperative medical regimen and is alive without having gastrointestinal symptoms as of 3 years and one month after the operation. Case 2. A woman who was 68 years old when she had first presented to our hospital underwent left mastectomy with axillary lymph node dissection for Stage I left breast cancer (ER positive and HER2 negative). CT scan conducted 10 years and 2 months after the mastectomy suggested descending colon metastasis from breast cancer. Colonoscopy revealed severe stricture of the lumen of the colon. To prevent intestinal obstruction, laparoscopic partial colectomy (descending colon) was performed and colonic metastasis of left breast cancer was diagnosed. After the operation she has been on endocrine therapy and is alive without intestinal symptoms, as of 2 years after the operation. Solitary colonic metastasis of breast cancer can be managed by local resection and medical treatment that might allow the patient to escape from intestinal symptoms and to live long.