title: Ethmoid roof radiology; analysis of lateral lamella of cribriform plate.
abstract: OBJECTIVE
  We evaluated the extent of asymmetry evident in paranasal sinus computed tomography (CT) scans of Turkish patients without sinusitis in the ethmoid roof. Our data contribute to the body of knowledge on the subject.
  
  
  METHODS
  We retrospectively studied multiplanar reformatted CT images of the paranasal sinus (1-mm sections) from 110 patients (50 male, 60 female). Ethmoid roof variations on either side were compared and the lateral lamellar length of the cribriform plate was measured. The results were scored using the Keros classification.
  
  
  RESULTS
  The lateral lamella of the cribriform plate averaged 5.78 mm in height on the right side and 5.98 mm on the left. The most common Keros type was type 2 (67.72%), followed by type 3 (22.28%), and type 1 (10%). Keros asymmetry (≥ 0.01 mm, affecting either side) was apparent in all patients (48.2% right-sided and 51.8% left-sided).
  
  
  RESULTS
  Preoperatively, paranasal sinus CT scans should be evaluated carefully to eliminate the possibility of life-threatening complications, including intracranial trauma, which may develop during endoscopic sinus surgery; the left and right sides of the ethmoid roof may differ in depth.
authors: vezirkopru state hospital ENT 1 clinic.
authors: Selvet
authors: S
authors: Erdogan
authors: ENT Department, Medicine Faculty, Kocaeli University.
authors: I Gurkan
authors: IG
authors: Keskin
authors: ENT Department, Medicine Faculty, Kocaeli University.
authors: Murat
authors: M
authors: Topdag
authors: ENT Department, Medicine Faculty, Kocaeli University.
authors: Murat
authors: M
authors: Ozturk
authors: Sarkisla State Hospital, ENT department, Sivas.
authors: Fatih
authors: F
authors: Sari
authors: Ümraniye Training and Research Hospital, ENT Clinic, Ümraniye,İstanbul-Turkey.
authors: Fatih
authors: F
authors: Mutlu
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D004724:Endoscopy; D005004:Ethmoid Bone / Q000033:anatomy & histology* / Q000166:cytology / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D010256:Paranasal Sinuses / Q000033:anatomy & histology* / Q000166:cytology / Q000000981:diagnostic imaging*; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed; D014421:Turkey; D055815:Young Adult