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Invasive urothelial carcinoma is a type of transitional cell carcinoma. It is a type of cancer that develops in the urinary system: the kidney , urinary bladder , and accessory organs. Transitional cell carcinoma is the most common type of bladder cancer and cancer of the ureter , urethra , renal pelvis , the ureters , the bladder , and parts ...
Transitional cell carcinoma is a type of cancer that arises from the transitional epithelium, a tissue lining the inner surface of these hollow organs. [1] It typically occurs in the urothelium of the urinary system; in that case, it is also called urothelial carcinoma.
Bladder tumors are classified by their appearance under the microscope, and by their cell type of origin. Over 90% of bladder tumors arise from the cells that form the bladder's inner lining, called urothelial cells or transitional cells; the tumor is then classified as urothelial cancer or transitional cell cancer.
Primary urethral cancer is rare and contributes to less than 1% of all cancers. It is three times more common in men than women and its incidence rises after the age of 75. [1] Around half of affected people have locally advanced disease when they first present. 54–65% of cases are of the urothelial carcinoma type. [1]
They cannot be reliably differentiated from low grade papillary urothelial carcinomas using cytology, [1] and their diagnosis (vis-a-vis low grade papillary urothelial carcinoma) has a poor inter-rater reliability. [2] Pathologic grading and staging tumors are: graded by the degree of cellular atypia (G1->G3), and staged: [citation needed ...
Ureter cancer rarely causes problems in the early stages, but as the cancer progresses, there are often side effects. [5] Symptoms of ureteral cancer may include "blood in the urine (); diminished urine stream and straining to void (caused by urethral stricture); frequent urination and increased nighttime urination (); hardening of tissue in the perineum, labia, or penis; itching; incontinence ...
Transitional cell carcinoma patients have a variety of treatment options. These include nephroureterectomy, or the removal of kidney, ureter, and bladder cuff, and segmental resection of the ureter. This is an option only when the cancer is superficial and infects only the bottom third of the ureter.
Progression of epithelial cancer often relies on deep and regional lymph node invasion. [12] The lamina propria, being one of the barriers to the submucosa, is an area where epithelial cancer invasion is of significance since lymphatic invasion is an independent predictor of lymph node metastasis , especially in gastric cancer . [ 13 ]