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[Spontaneous rupture of a simple renal cyst to the pyelocalyceal system. Evolution from Bosniak I to IIF]
Alberto Hernández Castrillo1, Enrique de Diego Rodríguez, Miguel Angel Rado Velázquez
1Servicio de Urología, Hospital Comarcal de Laredo, Laredo, Cantabria, España. a.h.castrillo@telefonica.net
Objective:
To report the spontaneous rupture of a renal cyst into the adjacent pyelocalyceal collecting system.
Methods:
We present the case of a 47 year old woman with a 17 centimeter simple renal cyst (Bosniak I) as well as ipsilateral nephrolithiasis. The patient had a febrile urinary tract infection with flank pain. A subsequent CT scan revealed that this cyst spontaneously ruptured into the renal pelvis.
Results:
Follow up evaluations showed the former cyst has decreased in size and contain thick and nodular calcifications. At present it is a Bosniak IIF cyst.
Conclusion:
Simple renal cysts can spontaneously rupture and drain into the adjacent renal collecting system.
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