Multiple causes: There are multiple causes, including inflammation, infection, scarring, and cancer. The ureters can also be compressed by extrinsic masses and structures located outside the ureters.
Answered 6/13/2014
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Here are some ...: Congenital anomaly such as UPJ obstruction, procedure-related stenoses from multiple trans-ureteroscopic procedures for stone or tumor, or surgical complications from various pelvic procedures such as hysterectomy, colon resection are the common examples of urethral narrowing in adults. For more detail, Ask your surgeon for specifics. Best wish...
Answered 12/14/2014
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