Significance of post-traumatic maxillary sinus fluid, or lack of fluid, in a level II XXXX population.

@entity130 @entity1 @entity174
UNASSIGNED: Our goal was to test the predictive value of high-attenuation material within the maxillary sinus for adjacent @entity174 . After IRB approval, all @entity130 facial CTs performed over a 5-month period at a level II @entity130 center were reviewed in consensus by three radiologists for the presence of facial @entity174 or high attenuation maxillary sinus opacity (>= 30HU, >= 40HU, or >= 50HU). Three classes of @entity174 were analyzed: any @entity174 , any @entity174 contiguous with the maxillary sinus, and only @entity174 not contiguous with the maxillary sinus. Statistics were calculated using two-by-two tables. A total of 844 cases were reviewed with 273 @entity1 having any @entity174 . There were 402 hemi-faces with any @entity174 and 62 hemi-faces with @entity174 contiguous with the maxillary sinus. Sensitivity, specificity, positive predictive value, and negative predictive value for any @entity174 (using the >= 40HU threshold) were 13, 99, 85, and 78  % respectively; for @entity174 contiguous with the sinus, these were 71, 99, 72, and 99  % respectively; and for only non-contiguous @entity174 , these were 2.3, 96, 13, and 80  %, respectively. We conclude that in this level II @entity130 population, lack of high attenuation maxillary sinus material nearly ruled out @entity174 in contiguity with the sinus. High-attenuation sinus material is only moderately predictive of a @entity174 contiguous with the maxillary sinus. Therefore, if after careful review a @entity174 is not identified, the radiologist should not be overly concerned that a @entity174 is being missed. High-attenuation sinus material is a poor marker for @entity174 not contiguous with the maxillary sinus.
