Table 1.
Diagnosis of 197 sinonasal tumors
| Diagnosis of lesions | Number (n) | Percentage |
|---|---|---|
| Malignant tumors | 116 | 100 |
| Lymphoma | 22 | 18.9 |
| Adenoid cystic carcinoma | 16 | 13.8 |
| Malignant melanoma | 11 | 9.5 |
| SCC | 11 | 9.5 |
| Rhabdomyosarcoma | 10 | 8.6 |
| Inverted papilloma with malignant transformation | 10 | 8.6 |
| Olfactory neuroblastoma | 9 | 7.8 |
| Ewing’s sarcoma | 4 | 3.4 |
| Adenocarcinoma | 4 | 3.4 |
| Primitive neuroectodermal tumor | 2 | 1.7 |
| Plasmacytoma | 2 | 1.7 |
| Osteosarcoma | 2 | 1.7 |
| Metastasis of renal carcinoma | 2 | 1.7 |
| Undifferentiated carcinoma | 2 | 1.7 |
| Other | 9 | 7.8 |
| Benign tumors | 81 | 100 |
| Inverted papilloma | 48 | 59.3 |
| Hemangioma | 9 | 11.1 |
| Schwannoma | 5 | 6.2 |
| Ossifying fibroma | 4 | 4.9 |
| Fibroangioma | 4 | 4.9 |
| Ameloblastoma | 2 | 2.5 |
| Hemangiopericytoma | 2 | 2.5 |
| Other | 7 | 8.6 |
SCC: Squamous cell carcinoma.