Abstract
A 86-year-old male was admitted to our hospital due to anemia and elevation of tumor marker. Computed tomography (CT) and colonoscopy showed sigmoid colon cancer. He complained of poorly controlled diabetes and obesity. Elective sigmoidectomy was planned, and a low carbohydrate diet during the perioperative period was recommended. His hemoglobin A1c (HbA1c) was improved from 8.4% (NGSP) to 6.1% and his bodyweight was decreased from 57 kg to 50 kg during the 2 month interval. We were able to perform sigmoidectomy safely. A low carbohydrate diet seems to be safe and effective for improving the condition of patients prior to surgery. Physicians should advise obese patients with diabetes to follow a low carbohydrate diet during the perioperative period, because it can have dramatic effects on the body weight and glycemic control.
