MKI67 and olfactory neuroblastoma: Data for 43 patients were analyzed retrospectively to evaluate prognostic parameters for TPR after curative treatment for olfactory neuroblastoma: age, age < / ≥ 50 years, sex, tumor classifications, curative therapy (monotherapy vs. combined, R0 vs. R1/2/x resection), Hyams‐grade (grades, grade I–II/III–IV), and Ki‐67 labeling index (values, labeling index < / ≥ 10%).