Background and Objectives : When performing a revision endoscopic sinus surgery, operators
should pay close attention due to the altered sinonasal anatomy or defects of anatomical
landmarks. Careful preperative evaluation of altered anatomy is important, however, little has been
reported on its structural changes. We investigated status of anatomical structures and mucosal
pathology by reviewing OMY CT in revision sinus surgeries.
Materials and Methods : A total of 117 operated sides (right ; 59, left ; 58) from 62 patients who
received revision endoscopic sinus surgeries were evlauated. They had history of previous sinus
surgeries such as Caldwell-Luc operation, polypectomy, or endoscopic sinus surgery. We
investigated the following 5 parameters by reviewing preperative OMU CT ; Sinus mucosal
pathology, bony thickening, absence of superior or middle turbinate, Eleven revealed structural
changes in the superior or middle turbinates, all of which were partially preserved.
Conclusion : Significant bony thickening, defects or changes of anatomical structures and
associated mucosal pathology were frequently found in revision endoscopic sinus surgeries.
Preoperative review of OMU CT, Identification of structural changes, and close attention during
surgery would be necessary.
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