| Source | Code | Name | Case count | Share of cases (%) |
|---|---|---|---|---|
| OPER_OUT | OPER_OUT_NOM(DNB20) | Endoscopic ethmoidectomy | 2766 | |
| OPER_IN | OPER_IN_NOM(DNB20) | Endoscopic ethmoidectomy | 2300 | |
| OPER_IN | OPER_IN_NOM(DNB10) | Endonasal ethmoidectomy | 161 | |
| 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 | 18 |