Do practitioners assess sinonasal adenocarcinoma extension similarly? Interdisciplinary concordance in 21 cases.

During multidisciplinary tumor board meetings, practitioners did not assess local extension in the same way. 76% of pre-operative T stages of adenocarcinoma were overestimated. 73% of patients underwent skull base removal for pT1 and T2 previously classified as cT3 and T4. The concordance of extension assessment between radiologist and pathologist was poor whereas it was good between surgeon and pathologist. These findings point to the opportunity to improve patient care and avoid therapeutic escalation.