Johns Hopkins Pathology
 
Key Points:
CT, EUS
  • Thick-walled cystic mass
  • Thick pseudocapsule
Images: Mucinous Cystadenoma #1 | Mucinous Cystadenoma #2 | Mucinous Cystadenoma #3 | Mucinous Cystadenoma #4 | Mucinous Cystadenocarcinoma |

Computerized tomography (CT) scans will usually demonstrate a well-demarcated thick-walled cystic mass. The cysts are usually large (1-3 cm) and, peripheral calcifications can be seen within the capsule of the neoplasm. Mural nodules and papillary excrescences into the cysts are more common in cystadenocarcinomas.

Ultrasound will also demonstrate the cystic nature of these neoplasms and ultrasound has the advantage that it can be used to facilitate biopsy of the lesion and sampling of the larger than benign mucinous cystic neoplasms. The outer surface of these tumors is usually well-demarcated, and the neoplasms often have a thick pseudocapsule.

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