Pathology
Classification:
- transitional cell carcinoma - 90%
- squamous carcinoma - 5-8%
- adenocarcinoma - 1-2%
- sarcoma - rare
Distribution:
- calyces and renal pelvis - 9%
- ureter - 1%
- bladder - 90%:
- posterior and lateral walls - 70%
- trigone and bladder neck - 20%
- vault - 10%
- diverticulum - 1-5%
- urethra - less than 1%
Carcinoma in situ is a potentially aggressive tumour that may occur anywhere in the urinary tract. Malignant change is confined to the bladder mucosa.
Tumours in the upper urinary tract often present late.
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