BackgroundColonic metastasis from breast carcinoma is very rare. Here, we report a case of colonic metastasis from breast carcinoma.Case presentationThe patient was a 51-year-old woman. She had upper abdominal pain, vomiting, and diarrhea, repeatedly. We performed abdominal contrast-enhanced computed tomography (CT) to investigate these symptoms. The CT scan revealed a tumor in the ascending colon with contrast enhancement and showed an expanded small intestine. For further investigation of this tumor, we performed whole positron emission tomography-computed tomography (PET-CT). The PET-CT scan revealed fluorodeoxyglucose uptake in the ascending colon, mesentery, left breast, and left axillary region. Analysis of biopsy samples obtained during colonoscopy revealed signet ring cell-like carcinoma. Moreover, biopsy of the breast tumor revealed invasive lobular carcinoma. Therefore, the preoperative diagnosis was colonic metastasis from breast carcinoma. Open ileocecal resection was performed. The final diagnosis was multiple metastatic breast carcinomas, and the TNM classification was T2N1M1 Stage IV.ConclusionsWe presented a rare case of colonic metastasis from breast carcinoma. PET-CT may be useful in the diagnosis of metastatic breast cancer. When analysis of biopsy samples obtained during colonoscopy reveals signet ring cell-like carcinoma, the possibility of breast cancer as the primary tumor should be considered.

Primary chylopericardium is a rare condition. The etiology and the treatment remain unclear. We report two cases of primary chylopericardium successfully treated by surgery. Both cases were asymptomatic young women and were found to have cardiomegaly on chest X-ray at a routine annual health examination. An echocardiography demonstrated massive pericardial effusion and chylous fluid was obtained with pericardiocentesis. Lymphoscintigraphy demonstrated abnormal communication between the pericardial sac and the thoracic duct. Because of reaccumulation of chylous pericardial effusion after conservative treatment, we performed surgical ligation of thoracic duct and partial pericardectomy by video-assisted thoracic surgery (VATS) in one case and by thoracotomy in another case. After surgery, both patients are doing well without recurrence of pericardial effusion. Surgical treatment including VATS is effective and should be performed in case of primary chylopericardium.

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