| Source | Code | Name | Case count | Share of cases (%) |
|---|---|---|---|---|
| OPER_OUT | OPER_OUT_NOM(DNB20) | Endoscopic ethmoidectomy | 3054 | |
| OPER_IN | OPER_IN_NOM(DNB20) | Endoscopic ethmoidectomy | 2535 | |
| OPER_IN | OPER_IN_NOM(DNB10) | Endonasal ethmoidectomy | 185 | |
| OPER_OUT | OPER_OUT_NOM(DNB10) | Endonasal ethmoidectomy | 52 | |
| OPER_IN | OPER_IN_NOM(DNB00) | External ethmoidectomy | 20 | |
| OPER_OUT | OPER_OUT_NOM(DNB00) | External ethmoidectomy | 20 |