A 45-year-old woman presents with a 3-month history of increasing abdominal bloating and occasional pelvic discomfort. She reports normal menstrual cycles and no weight loss or changes in bowel habits. Physical examination is unremarkable except for mild abdominal distension. Routine blood tests, including CA-125, are within normal limits. A CT scan of the pelvis is performed, with a relevant axial image shown. Considering the clinical presentation, the normal CA-125 level, and the findings demonstrated in the image, what is the MOST appropriate next step in the management of this patient?