The cause of hydronephrosis

The cause of hydronephrosis

Hydronephrosis can be pided into primary and secondary two. Primary hydronephrosis, also known as congenital hydronephrosis, spontaneous hydronephrosis, idiopathic hydronephrosis. The most important cause is the obstruction of the ureteropelvic junction, which is often due to the site of the muscle cells by a large number of collagen fibers separated, lost the normal arrangement, can not effectively transmit from the pacing cells of electrical activity, blocking the normal peristalsis The transmission.
Congenital hydronephrosis and more caused by mechanical obstruction, the main reasons are: ectopic blood vessels: such as from the lower pole of the vagus vagal vascular compression; fiber cord; ureteropelvic high insertion; ureteropelvic junction ureteropia Junction, UPJO) and valvular; membranous adhesions caused by local ureteral tortuosity. Congenital hydronephrosis can also be caused by the cause of power, such as segmental non-dynamic dysfunction.
Secondary hydronephrosis due to other diseases caused by the urinary system, through routine examination can generally find the primary disease, some diseases need to pass a special examination (such as CT, magnetic resonance imaging, etc.) to confirm the diagnosis. These diseases include: upper urinary tract obstructive lesions, tumors, polyps, stones, tuberculosis, inflammation, injury, deformity, perticulum, renal ptosis, etc .; upper urinary tract external compression, abdomen, pelvic or retroperitoneal mass, Peritoneal fibrosis, ectopic blood vessels, pregnancy and menstrual congestion of the ovarian vein compression; lower urinary tract obstructive lesions, benign prostatic hyperplasia, prostate cancer, urethral stricture, vesicoureteral reflux and so on.

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