| Source | Code | Name | Case count | Share of cases (%) |
|---|---|---|---|---|
| OPER_OUT | OPER_OUT_NOM(DNB20) | Endoscopic ethmoidectomy | 2478 | |
| OPER_IN | OPER_IN_NOM(DNB20) | Endoscopic ethmoidectomy | 2124 | |
| OPER_IN | OPER_IN_NOM(DNB10) | Endonasal ethmoidectomy | 148 | |
| OPER_OUT | OPER_OUT_NOM(DNB10) | Endonasal ethmoidectomy | 48 | |
| OPER_IN | OPER_IN_NOM(DNB00) | External ethmoidectomy | 19 | |
| OPER_OUT | OPER_OUT_NOM(DNB00) | External ethmoidectomy | 17 |