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Transitional cell carcinoma (TCC, also urothelial cell carcinoma or UCC) is a type of cancer that typically occurs in the urinary system: the kidney, urinary bladder, and accessory organs. It is the most common type of bladder cancer and cancer of the ureter, urethra, and urachus. It is the second most common type of kidney cancer, but accounts for only five to 10 percent of all primary renal malignant tumors. TCC arises from the transitional epithelium, a tissue lining the inner surface of these hollow organs. It can extend from the kidney collecting system to the bladder - "Creeping Tumor".〔Selvaraj V, Govindarajan P, Deepak M, Sivaraj M. "The creeping tumor:" An unusual presentation of upper urinary tract malignancy. Indian J Urol 2014;30:454-5.〕 When the term "urothelial" is used, it specifically refers to a carcinoma of the urothelium, meaning a TCC of the urinary system. ==Signs and symptoms== Signs and symptoms depend on the location and extent of the cancer: see for example Bladder cancer. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「transitional cell carcinoma」の詳細全文を読む スポンサード リンク
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