Regional Recurrences and Hyams Grade in Esthesioneuroblastoma.

The aim of this study is to determine if Hyams grade may help predict which patients with esthesioneuroblastoma (ENB) tumors are likely to develop regional recurrences, and to determine the impact of tumor extent on regional failure in ENB patients without evidence of nodal disease at presentation.  The study was designed as a retrospective review for ENB patients.  The study was prepared at tertiary care academic center for ENB patients.  Patients with ENB were included in the study.   Oncologic outcomes (5-year regional and locoregional control (LRC) and overall survival) in patients with Hyams low grade versus high grade. Oncologic outcomes based on radiographic disease extent.  A total of 43 patients were included. Total 25 patients (58%) had Hyams low-grade tumor, and 18 (42%) had high-grade tumor. Of the 34 patients without regional disease at presentation, 8 (24%) were treated with elective nodal radiation. There were no statistically significant differences in 5-year regional control in the Hyams low-grade versus high-grade groups (78 vs. 89%;  = 0.4). The 5-year LRC rates in patients with low grade versus high grade were 73 versus 89% (  = 0.6). The 5-year overall survival rates in patients with low-grade versus high-grade tumors were 86 versus 63% (  = 0.1). Radiographic extension of disease into the olfactory groove, olfactory nerve, dura, and periorbita were statistically associated with decreased 5-year overall survival (5-year OS 49 vs. 91% [  = 0.04], 49 vs. 91% [  = 0.04], 44 vs. 92% [  = 0.02], and 44 vs. 80% [  = 0.04], respectively).  ENBs are associated with a risk of regional failure. The current analysis suggests that Hyams low-grade and high-grade malignancies have comparable rates of early and delayed regional recurrences, although small sample size may limit our conclusions.