title: Magnetic resonance imaging of the paranasal sinuses: frequency and type of abnormalities.
abstract: This retrospective study reports on sinus abnormalities detected in patients having magnetic resonance imaging (MRI) scans. Over a 12-month period, 1120 patients (aged 2-87 years) had MRI scans done for suspected intracranial pathology. Scans were reviewed independently for abnormal sinuses using four criteria: increased signal of the epithelial lining, cloudy or opacified sinus cavity, air-fluid levels, and intrasinus polyps. Thirteen percent of the 1120 patients had abnormal sinus images with the maxillary being the most involved cavity. A cloudy or opacified sinus was found in 43% of these cases. An increased signal to the epithelial lining was present in 44%. Intrasinus polyps were found in 27 paranasal sinus cavities (27 subjects). Furthermore, a seasonal pattern was evident for abnormal sinus scans. The months of July, August, September, and December had the highest frequency of abnormalities noted (greater than 16% of total scans done) whereas there was a low percentage (less than 8%) found during February and November. In summary, abnormalities of the paranasal sinuses occur frequently and vary with the time of year.
authors.affiliation: Department of Pediatrics, Bowman Gray School of Medicine, Wake Forest University, Winston-Salem, NC.
authors.forename: B L
authors.initials: BL
authors.lastname: Conner
authors.forename: E S
authors.initials: ES
authors.lastname: Roach
authors.forename: W
authors.initials: W
authors.lastname: Laster
authors.forename: J W
authors.initials: JW
authors.lastname: Georgitis
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002675:Child, Preschool; D005005:Ethmoid Sinus / Q000002:abnormalities / Q000473:pathology; D006801:Humans; D008279:Magnetic Resonance Imaging; D008443:Maxillary Sinus / Q000002:abnormalities / Q000473:pathology; D008875:Middle Aged; D010256:Paranasal Sinuses / Q000002:abnormalities / Q000473:pathology*; D012621:Seasons