Cyst, what art thou?

A 51-year-old woman, with a medical history of abnormal Pap smears, extended menstrual cycles, and Barrett’s esophagus, underwent an upper gastrointestinal endoscopic ultrasound for abnormal findings on a computed tomography scan. The ultrasound characterized a peripherally calcified, multicystic, and septated lesion that was close to both the pancreatic tail and the upper pole of the left kidney. It measured 42 by 37 mm. Biochemical analysis was conducted on the lesion’s contents (Table 1).