A Case of Rectal Villous Tumor Detected with Heart Failure and Electrolyte Imbalance

A 74-year-old woman presented to our emergency department with a chief complaint of appetite loss, and already diagnosed dehydration and heart failure. After hospitalization, the signs of heart failure were improved with liquid supplementation and electrolyte revision. At admission, computed tomography incidentally detected a rectal tumor. She underwent colonography, which revealed a huge villous tumor in the rectum. Based on the result of the initial biopsy, it was classified as a group 4 tumor, but additional biopsy of specimens obtained from 6 places led to a diagnosis of group 5 tumor. Then, we performed laparoscopic super-low anterior resection and made an ileal stoma. The electrolyte imbalance was improved and did not recur after the operation. In this case, the electrolyte imbalance caused by the huge villous tumor was electrolyte depletion syndrome (EDS).