An Endoscopic Endonasal Approach for Early-Stage Olfactory Neuroblastoma: An Evaluation of 2 Cases with Minireview of Literature

Figure 7

Pathological findings in case 2. Hematoxylin-eosin stains showed a nest-like tumor mass under the mucosa. The tumor cells showed monotonous growth. Based on slight anisokaryosis and mitotic figures, the tumor was diagnosed as an ONB, Hyams’s stage II.