Metastatic Invasive Lobular Breast Carcinoma Mimicking Obstructive Primary Colonic Malignancy: A Case Report

Abstract

CASE REPORT A 40-year-old woman with good past health presented with a 2-week history of repeated vomiting. Abdominal radiograph revealed multiple dilated large bowel loops. Urgent computed tomography of the abdomen and pelvis revealed a circumferential colonic tumour at the splenic flexure causing upstream bowel dilatation (Figure 1) and a solid peritoneal nodule suspicious of metastasis (Figure 2). An enhancing irregular left breast mass with spiculated margin, invading the underlying pectoralis major muscle, was noted incidentally on the computed tomography scan (Figure 3). The patient subsequently underwent emergency surgery that revealed an obstructing circumferential tumour at the splenic flexure of the colon and multiple small peritoneal nodules. Extended right hemicolectomy was performed.