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Bladder cancer in cats and dogs usually is transitional cell carcinoma, [1] which arises from the epithelial cells that line the bladder. Less often, cancer of the urinary bladder is squamous cell carcinoma , adenocarcinoma , or rhabdomyosarcoma .
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.
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 ...
Cats living in a smoker's household are three times more likely to develop lymphoma. [20] Compared to living in a smoke-free environment, cats exposed to passive smoking also have a greater chance of developing squamous cell carcinoma or mouth cancer. Cancer risk also arises from the cat's grooming habits.
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.
Should the transitional cell carcinoma grow toward the inner surface of the bladder via finger-like projections, it is known as papillary carcinoma. Otherwise, it is known as flat carcinoma. [ 11 ] Either form can transition from non-invasive to invasive by spreading into the muscle layers of the bladder.
Jo Denman and Tessa Parry-Wingfield formed a close friendship after they were both diagnosed with a rare form of cancer which resulted in them each having an eye removed
Around half of affected people have locally advanced disease when they first present. 54–65% of cases are of the urothelial carcinoma type. [ 1 ] Prolonged irritations of the urethra due to urinary catheterization , chronic inflammation due to infection, radiation, diverticula of the urethra , and urethral strictures, may increase the risk of ...