What is the cause of right kidney hydrops

In life, we often find some people suffering from right hydronephrosis. Most patients with this disease are between 20 and 40 years old. When suffering from right hydronephrosis, patients do not have obvious symptoms for a certain period of time, but they may occasionally feel some discomfort in the abdomen. However, at this time, it often does not attract the attention of patients, and many times the disease is delayed in this way.

Congenital obstructive causes include

① Segmental dysfunction:

Due to segmental muscle deficiency, hypoplasia or anatomical disorder at the ureteropelvic junction or upper ureter, the normal peristalsis of this section of ureter is affected, causing dynamic obstruction. If this lesion occurs at the entrance of the ureter to the bladder, it will form congenital megaureter, resulting in dilatation and hydronephrosis of the kidney and ureter.

② Intrinsic ureteral stenosis:

Most of them occur at the junction of the renal pelvis and ureter. The narrow segment is usually 1 to 2 mm, but can be as long as 1 to 3 cm, causing incomplete obstruction and secondary twisting. Under an electron microscope, it can be seen that there are excessive collagen fibers around the muscle cells and in the middle of the cells in the obstructed segment. Over time, the muscle cells are damaged, forming an inelastic narrow segment composed mainly of collagen fibers, which hinders the transmission of urine and causes hydronephrosis.

③Ureteral distortion, adhesion, banding or valve prong structure

This can be congenital or acquired, often occurring at the junction of the renal pelvis and ureter and the lumbar segment of the ureter, accounting for almost 2/3 of children and infants.

④ Ectopic blood vessels compress about 1/3

They are ectopic hilar vessels located anterior to the ureteropelvic junction. Others include horseshoe-shaped kidney and obstructed renal rotation during embryonic development.

⑤ High ureteral opening:

It can be congenital or caused by asymptomatic renal pelvic dilatation due to peripelvic fibrosis or vesicoureteral reflux, resulting in a relative upward migration of the ureteropelvic junction, making it impossible to detect stenosis during surgery.

⑥ Congenital ureteral ectopia, cyst, double ureter, etc.

Acquired obstruction

① Post-inflammatory or ischemic scars lead to local fixation.

② Vesicoureteral reflux causes ureteral twisting, which, combined with periureteral fibrosis, eventually leads to obstruction of the ureteropelvic junction or ureter.

③ Tumors, polyps and other neoplasms of the renal pelvis and ureter may be primary or metastatic.

④ Ectopic kidney (wandering kidney).

⑤ Narrowing caused by stones, trauma, and scars after trauma.