Table 1 Comparison of urachal carcinoma staging systems
Stage | Sheldon | Mayo clinic |
|---|---|---|
I | Confined to the urachal mucosa | Confined to the urachus and/or the bladder |
II | Invasion confined to the urachus itself | Extension beyond the muscular layer of the urachus and/or the bladder |
III | Â | Metastases to the regional lymph nodes |
IIIA | Extension to the bladder | Â |
IIIB | Extension to the abdominal wall | |
IIIC | Extension to the peritoneum | |
IIID | Extension to the viscera other than the bladder | |
IV | Â | Metastases to non-regional lymph nodes or other distant sites |
IVA | Metastases to the lymph nodes | Â |
IVB | Metastases to distant sites |