RT Journal Article SR Electronic T1 Double mucocele of the paranasal sinuses. JF American Journal of Neuroradiology JO Am. J. Neuroradiol. FD American Society of Neuroradiology SP 1263 OP 1264 VO 15 IS 7 A1 J L Weissman A1 H D Curtin A1 D E Eibling YR 1994 UL http://www.ajnr.org/content/15/7/1263.abstract AB We have observed two contiguous mucoceles in one patient. Based on the mucoceles' signal intensities on MR imaging, as well as their anatomic location as delineated by CT and MR, we hypothesize that the "downstream" mucocele obstructed the "upstream" sinus, leading to formation of a secondary mucocele.