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Bladder Anatomy and ICD-O-3
Anatomy of the Bladder. Source: TNM Atlas, 3rd edition, 2nd revision.
The bladder is divided into eight subsites (see table below). The location of the bladder tumor is not commonly recorded on the pathology report.
- For Primary Sites, use ICD-O-3 (Topography section): ICD-O-3.1
or the Solid Tumor Rules
Priority order for coding primary site
- ICD-O
- SEER Program Coding Manual (Including Coding Guidelines in Appendix C)
- Solid Tumor Rules (Urinary)
NAACCR Item # 400: Primary Site (NAACCR Item #2580 Text-Primary Site Title)
| ICD-O-3 Codes | ICD-O-3 Preferred Term | Synonyms |
|---|---|---|
| C670 | Trigone of bladder | Base of bladder Below interureteric crest Below interureteric field Below interureteric ridge Floor of bladder |
| C671 | Dome of bladder | Roof Vault Vertex |
| C672 | Lateral wall of bladder | Lateral to ureteral orifice Left wall Right wall Sidewall |
| C673 | Anterior wall of bladder | |
| C674 | Posterior wall of bladder | |
| C675 | Bladder neck | Internal urethral orifice Vesical neck |
| C676 | Ureteric orifice | Just above ureteric orifice |
| C677 | Urachus | Mid umbilical ligament Urachal remnant |
| C678 | Overlapping lesion of bladder | Lateral-posterior wall (hyphen) |
| C679 | Bladder, NOS | Lateral posterior wall (no hyphen) |
See the current version of the SEER Program Coding Manual, Section IV: Description of this Neoplasm and Appendix C for complete coding instructions for primary site.
Updated: April 22, 2025