Olfactory Function Following Endoscopic Endonasal Skull Base Surgery

The purpose of this study is to compare a subject's sense of smell before and after
endoscopic endonasal surgery to remove a skull base abnormality (i.e. tumor, inflammatory
process, fracture, defect, etc.) and use the information collected to validate approaches to
surgery that will minimize side effects to the sense of smell function. Data will be
collected using a smell identification test along with two questionnaires. In addition,
demographic, medical history, treatment, outcome, and follow-up information will be
collected.