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Parapelvic Cysts of the Kidney: Symptoms, Diagnosis and Treatment
Definition of Renal Parapelvic Cysts
Parapelvic cysts of the kidneys are simple renal cysts adjacent to the renal pelvis or the renal sinus.
Etiology of Parapelvic Cysts
Typical parapelvic cysts are multiple and probably derive from lymphatic vessels, often associated with nephrolithiasis or urinary obstruction. Parapelvic cysts may also derive from the renal parenchyma adjacent to the renal pelvis.
Signs and Symptoms
Usually, there are no complaints. Parapelvic cysts can compress the pyelocalyceal system or ureter, cause flank pain, or lead to other symptoms of urinary obstruction.
Diagnostic Workup of Parapelvin Cysts
Renal ultrasound should be sufficient in most cases for the diagnosis. In doubtful ultrasound findings, perform an intravenous pyelography, abdominal CT, or renal scintigraphy to rule out a urinary obstruction.
Differential Diagnosis of Parapelvic Cysts
Hydronephrosis (upper urinary tract obstruction).
Treatment of Parapelvic Cysts
Treatment of parapelvic cysts is rarely necessary; see section simple renal cyst.
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Israel, G. M. & Bosniak, M. A.
An update of the Bosniak renal cyst classification system.
Urology, 2005, 66, 484-488
Deutsche Version: Parapelvine Nierenzyste