A 48-year-old man complains of abdominal pain, severe bladder pressure, and pain with coughing for 2 years.

Fig. 110.1 (A–D) Axial and sagittal images of the abdomen and pelvis show a large, low-attenuating mass in the right lower quadrant of the abdomen extending into the pelvis with internal septations.

Multilocular mesothelial (peritoneal) inclusion cyst

• Lymphangioma
  
• Ovarian cystadenoma/cystadenocarcinoma
  
• Cystic carcinoma
  
• Mesenteric-omental cyst
  
• Visceral cysts