The spectrum of peripelvic cysts

Area of Science:

• Nephrology
• Radiology
• Urology

Background:

• Peripelvic cysts are fluid-filled sacs located in the renal sinus.
• They are typically discovered incidentally during imaging studies.
• Their clinical significance can be underestimated due to subtle presentation.

Purpose of the Study:

• To discuss unusual findings associated with peripelvic cysts.
• To highlight potential diagnostic challenges and pitfalls in imaging peripelvic cysts.
• To emphasize the importance of considering peripelvic cysts in the differential diagnosis of collecting system obstruction.

Main Methods:

• Review of nineteen cases with peripelvic cysts exhibiting unusual characteristics.
• Analysis of imaging findings, including nephrotomography and ultrasonography.
• Comparison with other renal pathologies such as renal sinus lipomatosis and hydronephrosis.

Main Results:

• Peripelvic cysts can cause collecting system obstruction that is not apparent on nephrotomography.
• Ultrasonographic evaluation may lead to misinterpretation as hydronephrosis.
• Differential diagnostic confusion with renal sinus lipomatosis is common.

Conclusions:

• Peripelvic cysts represent a potential cause of renal obstruction despite often being incidental findings.
• Advanced imaging techniques and careful interpretation are crucial for accurate diagnosis.
• Awareness of these unusual presentations is necessary to avoid misdiagnosis and ensure appropriate patient management.