Serous cystadenoma is also known as a microcystic adenoma and is the second-most common cystic tumor of the pancreas. These tumors have a honeycombed appearance on pathology, and that appearance is also characteristically seen on the CT scan. Diagnosis is made based on a characteristic CT scan for this tumor. These lesions are almost always benign and progression to cancer is unlikely. The preferred treatment for this lesion is observation without surgery unless the patient has clinical symptoms associated with this tumor.