Accurate Diagnosis After Multidisciplinary Tumor Board: A Case Report of Cholangiocarcinoma

Abstract Multidisciplinary tumor boards (MDTBs) provide a venue for discussion of diagnosis, staging, and treatment of patients with cancer. MDTBs have been shown to improve diagnostic accuracy and staging, exemplified in this patient with a hepatic flexure mass on colonoscopy and initial pathology suggestive of primary colonic adenocarcinoma with surface mucosal involvement. However, subsequent CT imaging revealed a biliary malignancy invading the colon. Discussion at a MDTB facilitated radiology-pathology correlation, with subsequent immunohistochemical stains compatible with a cholangiocarcinoma with transmural colonic invasion. Prompt and accurate diagnosis after the MDTB enabled the oncology team to offer the proper treatment approach.