RADIOLOGY: FEMALE REPRODUCTIVE: Case# 33030: CYSTIC MASS, LARGE HYDROSALPINX. 72 year old woman. Large, predominantly cystic mass in the pelvis. Differential includes a cystic tumor of the ovary such as cystadenoma or cyst- adenocarcinoma. Other possibilities include a large hydrosalpinx or peritoneal inclusion cyst. Also possible is a large lymphocele, given the patients surgical history. Cholelithiasis. There are also stones seen within the region of the porta hepatis and may be within either the cystic duct or common bile duct.