Nasal cavity, paranasal sinuses, nasopharynx
Inflammatory / infectious lesions

Author: Nat Pernick, M.D. (see Authors page)

Revised: 17 May 2018, last major update November 2004

Copyright: (c) 2004-2018,, Inc.

PubMed Search: Mucocele[TI] nasal[TIAB]

Cite this page: Pernick, N. Mucocele. website. Accessed October 19th, 2018.
Definition / general
  • Also called pseudocyst
  • Complication of chronic sinusitis due to outflow obstruction
  • May destroy contiguous bones and resemble a neoplasm
  • 2/3 in frontal sinus; also anterior ethmoid sinus
Microscopic (histologic) description
  • Inflammatory cells and mucin lift epithelium of sinus and periosteum away from underlying bone
  • Epithelium may undergo squamous metaplasia
  • Extravasation of mucin into lamina propria with muciphages