Mucopyoceles

Abstract

A mucopyocele is an infected paranasal sinus mucocele, which can extend into adjacent structures such as the orbit and/or the cranial cavity. Symptoms are due to anatomic mass effect. Systemic manifestations of infection are uncommon. Mucopyocele is best seen on CT scanning, which shows soft tissue opacification and expansion of the sinus, with thinning and loss of bone. Intravenous contrast typically shows ring enhancement. MRI is useful in identifying the relationship between the lesions and surrounding vital structures such as brain, orbit, and vascular structures. Histopathologic examination shows a cystic lesion lined with respiratory mucosa with pyogenic inflammation and suppurative necrosis. Isolation and identification of the causative bacteria is crucial for selecting the most appropriate antibiotic. Various surgical methods, including external or transnasal endoscopic approaches, are used to successfully eliminate the suppurative collection. Outcomes are usually excellent.