An 84-year-old woman presents with diarrhea and leukocytosis.

Fig. 111.1 (A–D) Axial and coronal images from a contrast-enhanced CT show an enlarged appendix filled with soft tissue density material and concentric calcifications. There is no significant soft tissue stranding in the surrounding mesentery. Additionally, there are coarse, rounded calcifications within the lymph nodes adjacent to the appendix.

Porcelain appendix secondary to an appendiceal mucocele

• Mucocele of the appendix
  
  
  
  • Nonneoplastic occlusion of the appendix (e.g., appendicolith)
    
  • Benign neoplasm (e.g., mucinous cystadenoma)
    
  • Malignant neoplasm (e.g., mucinous cystadenocarcinoma)
  
  
• Chronic tubercular or pyogenic abscess
  
• Porcelain gallbladder
  
• Degenerated leiomyoma