Renal Hydronephrosis and Cyst Formation During Pregnancy - Urology

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Renal edema and blister issues?


Hello Doctor, I was unaware of my severe hydronephrosis on the right side before pregnancy, as it did not cause any pain until I discovered it during a health check after becoming pregnant.
The doctor suspected it might be caused by kidney stones.
In early November, an ultrasound showed that my entire right kidney was filled with fluid, but I did not experience any pain.
Unfortunately, I experienced acute renal pain in early December and again in the past few days, leading me to visit the emergency room.
Today, the emergency physician performed an ultrasound and found that the previously fluid-filled right kidney now has many cysts that were not present in November.
(1) Why did so many cysts suddenly develop in just over a month? (2) I may undergo endoscopic surgery to investigate the cause of the obstruction and hydronephrosis; can the condition of the cysts be checked at the same time? Thank you!

Yi Yi, 30~39 year old female. Ask Date: 2017/12/25

Dr. Du Shixi reply Urology


Hello: Some pregnant women may experience renal edema during pregnancy.
If discomfort persists, it is recommended to have a thorough examination at a major hospital to determine the cause.
1) It will not happen.
2) Endoscopic examination of the bladder cannot be performed.
Wishing you good health.

Reply Date: 2017/12/25

More Info


Renal hydronephrosis during pregnancy can be a concerning condition, especially when it is accompanied by the formation of cysts or fluid-filled spaces within the kidney. Your situation, where you have been diagnosed with severe hydronephrosis and now have developed multiple cysts in the right kidney, raises several important questions regarding the underlying causes, management, and potential implications for both you and your baby.

1. Understanding the Sudden Appearance of Cysts:
The sudden formation of cysts in your kidney over a short period can be attributed to several factors. Hydronephrosis itself is characterized by the swelling of a kidney due to a build-up of urine, which can occur when there is an obstruction in the urinary tract. This obstruction could be caused by kidney stones, as you mentioned, or other factors such as strictures or congenital anomalies. When urine is unable to drain properly, it can lead to increased pressure within the kidney, resulting in the formation of cysts. These cysts may represent dilated renal tubules or could be a result of the kidney's response to the increased pressure and fluid accumulation.

2. Potential for Endoscopic Evaluation:
Regarding your upcoming endoscopic procedure to investigate the cause of the hydronephrosis, it is indeed possible to assess the cysts during this examination. An endoscopic approach allows for direct visualization of the urinary tract, and if the cysts are accessible, the physician may be able to evaluate their characteristics and determine if they require any intervention. It is essential to communicate your concerns about the cysts to your healthcare provider before the procedure, so they can plan accordingly and ensure a comprehensive evaluation.

3. Implications for Pregnancy:
Hydronephrosis during pregnancy is relatively common due to the physiological changes that occur, including hormonal influences and the growing uterus exerting pressure on the urinary tract. While many cases resolve without intervention, severe hydronephrosis, especially when accompanied by pain or infection, may require closer monitoring and management. The presence of kidney stones can complicate matters, as they may lead to acute pain and potential infection, which can pose risks to both maternal and fetal health.

4. Management Strategies:
Management of hydronephrosis during pregnancy typically involves a multidisciplinary approach. This may include:
- Monitoring: Regular ultrasounds to assess kidney function and the status of hydronephrosis.

- Pain Management: Medications that are safe during pregnancy to manage any discomfort.

- Surgical Intervention: If the obstruction is severe and causing significant symptoms or complications, procedures such as ureteral stenting or nephrostomy may be considered, even during pregnancy, to relieve the obstruction and prevent further kidney damage.

5. Long-term Considerations:
After delivery, further evaluation of your renal status may be warranted, especially if the hydronephrosis and cysts persist. Follow-up imaging and possibly additional interventions may be necessary to ensure that your kidney function is preserved and to address any underlying issues that may have contributed to the hydronephrosis and cyst formation.

In conclusion, while the presence of hydronephrosis and cysts during pregnancy can be concerning, with appropriate monitoring and management, many women can have successful pregnancies. It is crucial to maintain open communication with your healthcare team, ensuring that all your concerns are addressed and that you receive the best care possible for both you and your baby.

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