title: Incidental detection of sinus mucosal abnormalities on CT and MRI imaging of the head.
abstract: OBJECTIVE
  To investigate the prevalence of incidental sinus abnormalities on CT and MRI imaging of the head, and identify if there is any correlation between patient symptomatology and image findings.
  
  
  METHODS
  One hundred and fifteen patients who underwent head CT or MRI for  non-sinus related indications were included in this study, with image findings being analysed based on the Lund-Mackay Grading System (LMS). These were compared with their symptomatology based on the SNAQ-11 questionnaire. Two reviewers who were blinded to the patients' SNAQ-11 scores analysed the images. Patients were also referred to an ENT surgeon for anterior rhinoscopy in an attempt to seek a correlation between symptomatology and/or imaging findings against clinical assessment.
  
  
  RESULTS
  The prevalence of incidental sinus abnormalities is between 14.8% and 37% for CT and 29.5% and 85.2% for MRI, depending upon the cutoff LMS used. There was no significant difference in the incidence rate between the different age groups or genders. Asymptomatic patients had a significantly lower incidence rate of sinus mucosal abnormalities (8.2-57.1%) when compared to the symptomatic patients (33.3-66.7%) (P<0.01). A significant correlation was found between the MRI sinus findings and patients' symptoms (r=0.59, P<0.001) with no correlation demonstrated in the CT group. The mean LM score for the patients with clinical sinusitis was 6.2, while the normal patients had a mean LM score of 2.2.
  
  
  CONCLUSIONS
  MRI is more sensitive than CT to detect sinus mucosal abnormalities. A significant correlation is noticed between MRI findings and patients' symptomatology.
authors: University of Malaya Research and Imaging Centre (UMRIC), University of Malaya, 50603 Kuala Lumpur, Malaysia; ; Department of Biomedical Imaging, University of Malaya, Kuala Lumpur, 50603, Malaysia;
authors: Mohammad
authors: M
authors: Nazri
authors: Shaik Ismail
authors: SI
authors: Bux
authors: Tengku Feisal
authors: TF
authors: Tengku-Kamalden
authors: Kwan-Hoong
authors: KH
authors: Ng
authors: Zhonghua
authors: Z
authors: Sun
keywords: Computed tomography; incidental findings; magnetic resonance imaging; mucosal abnormalities; sinus
references: Orthod Craniofac Res. 2011 Feb;14(1):17-24
references: 21205165
references: Diagn Interv Radiol. 2012 Mar-Apr;18(2):159-63
references: 21960135
references: Singapore Med J. 2010 May;51(5):374-80
references: 20593141
references: N Engl J Med. 2007 Nov 29;357(22):2277-84
references: 18046031
references: Otolaryngol Head Neck Surg. 1997 Sep;117(3 Pt 2):S35-40
references: 9334786
references: Rhinology. 2002 Dec;40(4):195-7
references: 12526247
references: Br J Radiol. 2010 Apr;83(988):276-89
references: 20335439
references: Otolaryngol Head Neck Surg. 2001 Nov;125(5):483-6
references: 11700446
references: Otolaryngol Head Neck Surg. 2009 Mar;140(3):306-11
references: 19248933
references: Quant Imaging Med Surg. 2012 Jun;2(2):98-105
references: 23256066
references: Eur Arch Otorhinolaryngol. 2005 Sep;262(9):751-4
references: 15754168
references: Laryngoscope. 1991 Jan;101(1 Pt 1):56-64
references: 1984551
references: Compend Contin Educ Dent. 2010 Oct;31(8):648-51
references: 20960995
references: Ann Otol Rhinol Laryngol Suppl. 2004 May;193:19-23
references: 15174756
references: Arch Otolaryngol Head Neck Surg. 1988 Aug;114(8):856-9
references: 3390327
references: J Laryngol Otol. 2003 Dec;117(12):969-72
references: 14738607